Home / 21,231.38-29,306.14-12,854.90

Finding the Fourth Proportional to 21,231.38, 29,306.14 and 12,854.90

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Solution

The fourth proportional to 21,231.38, 29,306.14 and 12,854.90 is: 17,743.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,231.38 : 29,306.14 = 12,854.90 : x
  2. Step 2: Convert to fraction form
    21,231.38/29,306.14 = 12,854.90/x
  3. Step 3: Cross multiply
    21,231.38x = 29,306.14 × 12,854.90
  4. Step 4: Simplify right side
    21,231.38x = 376,727,499.09
  5. Step 5: Solve for x
    x = 376,727,499.09/21,231.38
  6. Step 6: Final answer
    x = 17,743.90

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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.