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Finding the Fourth Proportional to 15,398.92, 23,109.82 and 6,639.88

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Solution

The fourth proportional to 15,398.92, 23,109.82 and 6,639.88 is: 9,964.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,398.92 : 23,109.82 = 6,639.88 : x
  2. Step 2: Convert to fraction form
    15,398.92/23,109.82 = 6,639.88/x
  3. Step 3: Cross multiply
    15,398.92x = 23,109.82 × 6,639.88
  4. Step 4: Simplify right side
    15,398.92x = 153,446,431.62
  5. Step 5: Solve for x
    x = 153,446,431.62/15,398.92
  6. Step 6: Final answer
    x = 9,964.75

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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.