Home / 20,372.19-28,115.24-11,990.31

Finding the Fourth Proportional to 20,372.19, 28,115.24 and 11,990.31

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Solution

The fourth proportional to 20,372.19, 28,115.24 and 11,990.31 is: 16,547.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,372.19 : 28,115.24 = 11,990.31 : x
  2. Step 2: Convert to fraction form
    20,372.19/28,115.24 = 11,990.31/x
  3. Step 3: Cross multiply
    20,372.19x = 28,115.24 × 11,990.31
  4. Step 4: Simplify right side
    20,372.19x = 337,110,373.04
  5. Step 5: Solve for x
    x = 337,110,373.04/20,372.19
  6. Step 6: Final answer
    x = 16,547.58

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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.