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Finding the Fourth Proportional to 40,375.40, 60,512.70 and 20,661.80

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Solution

The fourth proportional to 40,375.40, 60,512.70 and 20,661.80 is: 30,966.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,375.40 : 60,512.70 = 20,661.80 : x
  2. Step 2: Convert to fraction form
    40,375.40/60,512.70 = 20,661.80/x
  3. Step 3: Cross multiply
    40,375.40x = 60,512.70 × 20,661.80
  4. Step 4: Simplify right side
    40,375.40x = 1,250,301,304.86
  5. Step 5: Solve for x
    x = 1,250,301,304.86/40,375.40
  6. Step 6: Final answer
    x = 30,966.91

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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.