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Finding the Fourth Proportional to 15,562.92, 21,476.90 and 8,489.49

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Solution

The fourth proportional to 15,562.92, 21,476.90 and 8,489.49 is: 11,715.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,562.92 : 21,476.90 = 8,489.49 : x
  2. Step 2: Convert to fraction form
    15,562.92/21,476.90 = 8,489.49/x
  3. Step 3: Cross multiply
    15,562.92x = 21,476.90 × 8,489.49
  4. Step 4: Simplify right side
    15,562.92x = 182,327,885.33
  5. Step 5: Solve for x
    x = 182,327,885.33/15,562.92
  6. Step 6: Final answer
    x = 11,715.53

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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.