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Finding the Fourth Proportional to 22,915.20, 34,315.20 and 18,307.20

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Solution

The fourth proportional to 22,915.20, 34,315.20 and 18,307.20 is: 27,414.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,915.20 : 34,315.20 = 18,307.20 : x
  2. Step 2: Convert to fraction form
    22,915.20/34,315.20 = 18,307.20/x
  3. Step 3: Cross multiply
    22,915.20x = 34,315.20 × 18,307.20
  4. Step 4: Simplify right side
    22,915.20x = 628,215,229.44
  5. Step 5: Solve for x
    x = 628,215,229.44/22,915.20
  6. Step 6: Final answer
    x = 27,414.78

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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.