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Finding the Fourth Proportional to 25,403.88, 38,100.06 and 8,987.88

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Solution

The fourth proportional to 25,403.88, 38,100.06 and 8,987.88 is: 13,479.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,403.88 : 38,100.06 = 8,987.88 : x
  2. Step 2: Convert to fraction form
    25,403.88/38,100.06 = 8,987.88/x
  3. Step 3: Cross multiply
    25,403.88x = 38,100.06 × 8,987.88
  4. Step 4: Simplify right side
    25,403.88x = 342,438,767.27
  5. Step 5: Solve for x
    x = 342,438,767.27/25,403.88
  6. Step 6: Final answer
    x = 13,479.78

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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.