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Finding the Fourth Proportional to 15,658.46, 21,607.79 and 8,943.69

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Solution

The fourth proportional to 15,658.46, 21,607.79 and 8,943.69 is: 12,341.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,658.46 : 21,607.79 = 8,943.69 : x
  2. Step 2: Convert to fraction form
    15,658.46/21,607.79 = 8,943.69/x
  3. Step 3: Cross multiply
    15,658.46x = 21,607.79 × 8,943.69
  4. Step 4: Simplify right side
    15,658.46x = 193,253,376.04
  5. Step 5: Solve for x
    x = 193,253,376.04/15,658.46
  6. Step 6: Final answer
    x = 12,341.78

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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.