Home / 25,787.20-38,681.28-20,655.04

Finding the Fourth Proportional to 25,787.20, 38,681.28 and 20,655.04

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Solution

The fourth proportional to 25,787.20, 38,681.28 and 20,655.04 is: 30,982.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,787.20 : 38,681.28 = 20,655.04 : x
  2. Step 2: Convert to fraction form
    25,787.20/38,681.28 = 20,655.04/x
  3. Step 3: Cross multiply
    25,787.20x = 38,681.28 × 20,655.04
  4. Step 4: Simplify right side
    25,787.20x = 798,963,385.65
  5. Step 5: Solve for x
    x = 798,963,385.65/25,787.20
  6. Step 6: Final answer
    x = 30,982.94

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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.