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Finding the Fourth Proportional to 22,758.60, 34,137.90 and 20,915.40

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Solution

The fourth proportional to 22,758.60, 34,137.90 and 20,915.40 is: 31,373.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,758.60 : 34,137.90 = 20,915.40 : x
  2. Step 2: Convert to fraction form
    22,758.60/34,137.90 = 20,915.40/x
  3. Step 3: Cross multiply
    22,758.60x = 34,137.90 × 20,915.40
  4. Step 4: Simplify right side
    22,758.60x = 714,007,833.66
  5. Step 5: Solve for x
    x = 714,007,833.66/22,758.60
  6. Step 6: Final answer
    x = 31,373.10

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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.