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Finding the Fourth Proportional to 15,747.68, 21,732.80 and 8,674.11

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Solution

The fourth proportional to 15,747.68, 21,732.80 and 8,674.11 is: 11,970.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,747.68 : 21,732.80 = 8,674.11 : x
  2. Step 2: Convert to fraction form
    15,747.68/21,732.80 = 8,674.11/x
  3. Step 3: Cross multiply
    15,747.68x = 21,732.80 × 8,674.11
  4. Step 4: Simplify right side
    15,747.68x = 188,512,654.44
  5. Step 5: Solve for x
    x = 188,512,654.44/15,747.68
  6. Step 6: Final answer
    x = 11,970.82

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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.