Home / 20,642.07-28,487.82-11,691.17

Finding the Fourth Proportional to 20,642.07, 28,487.82 and 11,691.17

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Solution

The fourth proportional to 20,642.07, 28,487.82 and 11,691.17 is: 16,134.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,642.07 : 28,487.82 = 11,691.17 : x
  2. Step 2: Convert to fraction form
    20,642.07/28,487.82 = 11,691.17/x
  3. Step 3: Cross multiply
    20,642.07x = 28,487.82 × 11,691.17
  4. Step 4: Simplify right side
    20,642.07x = 333,055,946.55
  5. Step 5: Solve for x
    x = 333,055,946.55/20,642.07
  6. Step 6: Final answer
    x = 16,134.81

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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.