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Finding the Fourth Proportional to 15,519, 21,416.04 and 8,445.30

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Solution

The fourth proportional to 15,519, 21,416.04 and 8,445.30 is: 11,654.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,519 : 21,416.04 = 8,445.30 : x
  2. Step 2: Convert to fraction form
    15,519/21,416.04 = 8,445.30/x
  3. Step 3: Cross multiply
    15,519x = 21,416.04 × 8,445.30
  4. Step 4: Simplify right side
    15,519x = 180,864,882.61
  5. Step 5: Solve for x
    x = 180,864,882.61/15,519
  6. Step 6: Final answer
    x = 11,654.42

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Double scale
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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.