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Finding the Fourth Proportional to 15,733.88, 21,711.93 and 8,658.94

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Solution

The fourth proportional to 15,733.88, 21,711.93 and 8,658.94 is: 11,948.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,733.88 : 21,711.93 = 8,658.94 : x
  2. Step 2: Convert to fraction form
    15,733.88/21,711.93 = 8,658.94/x
  3. Step 3: Cross multiply
    15,733.88x = 21,711.93 × 8,658.94
  4. Step 4: Simplify right side
    15,733.88x = 188,002,299.15
  5. Step 5: Solve for x
    x = 188,002,299.15/15,733.88
  6. Step 6: Final answer
    x = 11,948.88

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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.