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Finding the Fourth Proportional to 40,422.48, 60,521.76 and 20,658.48

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Solution

The fourth proportional to 40,422.48, 60,521.76 and 20,658.48 is: 30,930.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,422.48 : 60,521.76 = 20,658.48 : x
  2. Step 2: Convert to fraction form
    40,422.48/60,521.76 = 20,658.48/x
  3. Step 3: Cross multiply
    40,422.48x = 60,521.76 × 20,658.48
  4. Step 4: Simplify right side
    40,422.48x = 1,250,287,568.52
  5. Step 5: Solve for x
    x = 1,250,287,568.52/40,422.48
  6. Step 6: Final answer
    x = 30,930.50

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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.