Home / 15,691.42-21,654.28-8,976.63

Finding the Fourth Proportional to 15,691.42, 21,654.28 and 8,976.63

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Solution

The fourth proportional to 15,691.42, 21,654.28 and 8,976.63 is: 12,387.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,691.42 : 21,654.28 = 8,976.63 : x
  2. Step 2: Convert to fraction form
    15,691.42/21,654.28 = 8,976.63/x
  3. Step 3: Cross multiply
    15,691.42x = 21,654.28 × 8,976.63
  4. Step 4: Simplify right side
    15,691.42x = 194,382,459.48
  5. Step 5: Solve for x
    x = 194,382,459.48/15,691.42
  6. Step 6: Final answer
    x = 12,387.82

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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.