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Finding the Fourth Proportional to 15,358.97, 21,191.13 and 8,644.20

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Solution

The fourth proportional to 15,358.97, 21,191.13 and 8,644.20 is: 11,926.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,358.97 : 21,191.13 = 8,644.20 : x
  2. Step 2: Convert to fraction form
    15,358.97/21,191.13 = 8,644.20/x
  3. Step 3: Cross multiply
    15,358.97x = 21,191.13 × 8,644.20
  4. Step 4: Simplify right side
    15,358.97x = 183,180,365.95
  5. Step 5: Solve for x
    x = 183,180,365.95/15,358.97
  6. Step 6: Final answer
    x = 11,926.61

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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.