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Finding the Fourth Proportional to 25,915.20, 38,872.80 and 17,620.80

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Solution

The fourth proportional to 25,915.20, 38,872.80 and 17,620.80 is: 26,431.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,915.20 : 38,872.80 = 17,620.80 : x
  2. Step 2: Convert to fraction form
    25,915.20/38,872.80 = 17,620.80/x
  3. Step 3: Cross multiply
    25,915.20x = 38,872.80 × 17,620.80
  4. Step 4: Simplify right side
    25,915.20x = 684,969,834.24
  5. Step 5: Solve for x
    x = 684,969,834.24/25,915.20
  6. Step 6: Final answer
    x = 26,431.20

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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.