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Finding the Fourth Proportional to 21,691.30, 32,547.84 and 8,553.10

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Solution

The fourth proportional to 21,691.30, 32,547.84 and 8,553.10 is: 12,833.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,691.30 : 32,547.84 = 8,553.10 : x
  2. Step 2: Convert to fraction form
    21,691.30/32,547.84 = 8,553.10/x
  3. Step 3: Cross multiply
    21,691.30x = 32,547.84 × 8,553.10
  4. Step 4: Simplify right side
    21,691.30x = 278,384,930.30
  5. Step 5: Solve for x
    x = 278,384,930.30/21,691.30
  6. Step 6: Final answer
    x = 12,833.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.