Home / 20,667.38-28,521.12-11,236.28

Finding the Fourth Proportional to 20,667.38, 28,521.12 and 11,236.28

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Solution

The fourth proportional to 20,667.38, 28,521.12 and 11,236.28 is: 15,506.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,667.38 : 28,521.12 = 11,236.28 : x
  2. Step 2: Convert to fraction form
    20,667.38/28,521.12 = 11,236.28/x
  3. Step 3: Cross multiply
    20,667.38x = 28,521.12 × 11,236.28
  4. Step 4: Simplify right side
    20,667.38x = 320,471,147.63
  5. Step 5: Solve for x
    x = 320,471,147.63/20,667.38
  6. Step 6: Final answer
    x = 15,506.14

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Find fourth proportional to 10,333.69, 14,260.56 and 5,618.14
Half scale
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Double scale
Find fourth proportional to 20,668.38, 28,522.50 and 11,237.28
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.