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Finding the Fourth Proportional to 25,390.80, 38,110.76 and 12,252.40

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Solution

The fourth proportional to 25,390.80, 38,110.76 and 12,252.40 is: 18,390.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,390.80 : 38,110.76 = 12,252.40 : x
  2. Step 2: Convert to fraction form
    25,390.80/38,110.76 = 12,252.40/x
  3. Step 3: Cross multiply
    25,390.80x = 38,110.76 × 12,252.40
  4. Step 4: Simplify right side
    25,390.80x = 466,948,275.82
  5. Step 5: Solve for x
    x = 466,948,275.82/25,390.80
  6. Step 6: Final answer
    x = 18,390.45

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