Home / 21,715.42-29,948.78-16,691.80

Finding the Fourth Proportional to 21,715.42, 29,948.78 and 16,691.80

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Solution

The fourth proportional to 21,715.42, 29,948.78 and 16,691.80 is: 23,020.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,715.42 : 29,948.78 = 16,691.80 : x
  2. Step 2: Convert to fraction form
    21,715.42/29,948.78 = 16,691.80/x
  3. Step 3: Cross multiply
    21,715.42x = 29,948.78 × 16,691.80
  4. Step 4: Simplify right side
    21,715.42x = 499,899,046.00
  5. Step 5: Solve for x
    x = 499,899,046.00/21,715.42
  6. Step 6: Final answer
    x = 23,020.46

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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.