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Finding the Fourth Proportional to 25,787.35, 38,681.84 and 9,147.12

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Solution

The fourth proportional to 25,787.35, 38,681.84 and 9,147.12 is: 13,720.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,787.35 : 38,681.84 = 9,147.12 : x
  2. Step 2: Convert to fraction form
    25,787.35/38,681.84 = 9,147.12/x
  3. Step 3: Cross multiply
    25,787.35x = 38,681.84 × 9,147.12
  4. Step 4: Simplify right side
    25,787.35x = 353,827,432.30
  5. Step 5: Solve for x
    x = 353,827,432.30/25,787.35
  6. Step 6: Final answer
    x = 13,720.97

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1.5x scale

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.