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Finding the Fourth Proportional to 48,391.20, 72,529.20 and 20,311.20

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Solution

The fourth proportional to 48,391.20, 72,529.20 and 20,311.20 is: 30,442.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,391.20 : 72,529.20 = 20,311.20 : x
  2. Step 2: Convert to fraction form
    48,391.20/72,529.20 = 20,311.20/x
  3. Step 3: Cross multiply
    48,391.20x = 72,529.20 × 20,311.20
  4. Step 4: Simplify right side
    48,391.20x = 1,473,155,087.04
  5. Step 5: Solve for x
    x = 1,473,155,087.04/48,391.20
  6. Step 6: Final answer
    x = 30,442.62

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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.