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Finding the Fourth Proportional to 22,892.80, 34,339.20 and 20,387.20

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Solution

The fourth proportional to 22,892.80, 34,339.20 and 20,387.20 is: 30,580.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,892.80 : 34,339.20 = 20,387.20 : x
  2. Step 2: Convert to fraction form
    22,892.80/34,339.20 = 20,387.20/x
  3. Step 3: Cross multiply
    22,892.80x = 34,339.20 × 20,387.20
  4. Step 4: Simplify right side
    22,892.80x = 700,080,138.24
  5. Step 5: Solve for x
    x = 700,080,138.24/22,892.80
  6. Step 6: Final answer
    x = 30,580.80

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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.