Home / 25,680.60-38,520.90-15,787.80

Finding the Fourth Proportional to 25,680.60, 38,520.90 and 15,787.80

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Solution

The fourth proportional to 25,680.60, 38,520.90 and 15,787.80 is: 23,681.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,680.60 : 38,520.90 = 15,787.80 : x
  2. Step 2: Convert to fraction form
    25,680.60/38,520.90 = 15,787.80/x
  3. Step 3: Cross multiply
    25,680.60x = 38,520.90 × 15,787.80
  4. Step 4: Simplify right side
    25,680.60x = 608,160,265.02
  5. Step 5: Solve for x
    x = 608,160,265.02/25,680.60
  6. Step 6: Final answer
    x = 23,681.70

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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.