Home / 20,667.71-28,520.23-11,236.19

Finding the Fourth Proportional to 20,667.71, 28,520.23 and 11,236.19

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Solution

The fourth proportional to 20,667.71, 28,520.23 and 11,236.19 is: 15,505.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,667.71 : 28,520.23 = 11,236.19 : x
  2. Step 2: Convert to fraction form
    20,667.71/28,520.23 = 11,236.19/x
  3. Step 3: Cross multiply
    20,667.71x = 28,520.23 × 11,236.19
  4. Step 4: Simplify right side
    20,667.71x = 320,458,723.12
  5. Step 5: Solve for x
    x = 320,458,723.12/20,667.71
  6. Step 6: Final answer
    x = 15,505.28

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Find fourth proportional to 10,333.86, 14,260.12 and 5,618.10
Half scale
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Double scale
Find fourth proportional to 20,668.71, 28,521.61 and 11,237.19
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.