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Finding the Fourth Proportional to 25,660.60, 38,515.20 and 15,819.10

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Solution

The fourth proportional to 25,660.60, 38,515.20 and 15,819.10 is: 23,743.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,660.60 : 38,515.20 = 15,819.10 : x
  2. Step 2: Convert to fraction form
    25,660.60/38,515.20 = 15,819.10/x
  3. Step 3: Cross multiply
    25,660.60x = 38,515.20 × 15,819.10
  4. Step 4: Simplify right side
    25,660.60x = 609,275,800.32
  5. Step 5: Solve for x
    x = 609,275,800.32/25,660.60
  6. Step 6: Final answer
    x = 23,743.63

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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.