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Finding the Fourth Proportional to 22,687.60, 34,031.40 and 15,689.20

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Solution

The fourth proportional to 22,687.60, 34,031.40 and 15,689.20 is: 23,533.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,687.60 : 34,031.40 = 15,689.20 : x
  2. Step 2: Convert to fraction form
    22,687.60/34,031.40 = 15,689.20/x
  3. Step 3: Cross multiply
    22,687.60x = 34,031.40 × 15,689.20
  4. Step 4: Simplify right side
    22,687.60x = 533,925,440.88
  5. Step 5: Solve for x
    x = 533,925,440.88/22,687.60
  6. Step 6: Final answer
    x = 23,533.80

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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.