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Finding the Fourth Proportional to 15,425.60, 21,287.20 and 8,352

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Solution

The fourth proportional to 15,425.60, 21,287.20 and 8,352 is: 11,525.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,425.60 : 21,287.20 = 8,352 : x
  2. Step 2: Convert to fraction form
    15,425.60/21,287.20 = 8,352/x
  3. Step 3: Cross multiply
    15,425.60x = 21,287.20 × 8,352
  4. Step 4: Simplify right side
    15,425.60x = 177,790,694.40
  5. Step 5: Solve for x
    x = 177,790,694.40/15,425.60
  6. Step 6: Final answer
    x = 11,525.69

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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.