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Finding the Fourth Proportional to 40,432.20, 60,648.30 and 20,749.20

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Solution

The fourth proportional to 40,432.20, 60,648.30 and 20,749.20 is: 31,123.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,432.20 : 60,648.30 = 20,749.20 : x
  2. Step 2: Convert to fraction form
    40,432.20/60,648.30 = 20,749.20/x
  3. Step 3: Cross multiply
    40,432.20x = 60,648.30 × 20,749.20
  4. Step 4: Simplify right side
    40,432.20x = 1,258,403,706.36
  5. Step 5: Solve for x
    x = 1,258,403,706.36/40,432.20
  6. Step 6: Final answer
    x = 31,123.80

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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.