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Finding the Fourth Proportional to 20,691.91, 28,554.24 and 11,740.24

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Solution

The fourth proportional to 20,691.91, 28,554.24 and 11,740.24 is: 16,201.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,691.91 : 28,554.24 = 11,740.24 : x
  2. Step 2: Convert to fraction form
    20,691.91/28,554.24 = 11,740.24/x
  3. Step 3: Cross multiply
    20,691.91x = 28,554.24 × 11,740.24
  4. Step 4: Simplify right side
    20,691.91x = 335,233,630.62
  5. Step 5: Solve for x
    x = 335,233,630.62/20,691.91
  6. Step 6: Final answer
    x = 16,201.19

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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.