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Finding the Fourth Proportional to 32,138.80, 48,251.40 and 20,474.80

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Solution

The fourth proportional to 32,138.80, 48,251.40 and 20,474.80 is: 30,739.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    32,138.80 : 48,251.40 = 20,474.80 : x
  2. Step 2: Convert to fraction form
    32,138.80/48,251.40 = 20,474.80/x
  3. Step 3: Cross multiply
    32,138.80x = 48,251.40 × 20,474.80
  4. Step 4: Simplify right side
    32,138.80x = 987,937,764.72
  5. Step 5: Solve for x
    x = 987,937,764.72/32,138.80
  6. Step 6: Final answer
    x = 30,739.72

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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.