Home / 15,708.29-21,677.15-8,634.56

Finding the Fourth Proportional to 15,708.29, 21,677.15 and 8,634.56

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Solution

The fourth proportional to 15,708.29, 21,677.15 and 8,634.56 is: 11,915.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,708.29 : 21,677.15 = 8,634.56 : x
  2. Step 2: Convert to fraction form
    15,708.29/21,677.15 = 8,634.56/x
  3. Step 3: Cross multiply
    15,708.29x = 21,677.15 × 8,634.56
  4. Step 4: Simplify right side
    15,708.29x = 187,172,500.75
  5. Step 5: Solve for x
    x = 187,172,500.75/15,708.29
  6. Step 6: Final answer
    x = 11,915.53

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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.