Home / 20,667.21-28,519.54-11,235.69

Finding the Fourth Proportional to 20,667.21, 28,519.54 and 11,235.69

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Solution

The fourth proportional to 20,667.21, 28,519.54 and 11,235.69 is: 15,504.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,667.21 : 28,519.54 = 11,235.69 : x
  2. Step 2: Convert to fraction form
    20,667.21/28,519.54 = 11,235.69/x
  3. Step 3: Cross multiply
    20,667.21x = 28,519.54 × 11,235.69
  4. Step 4: Simplify right side
    20,667.21x = 320,436,710.38
  5. Step 5: Solve for x
    x = 320,436,710.38/20,667.21
  6. Step 6: Final answer
    x = 15,504.59

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Half scale
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Double scale
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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.