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Finding the Fourth Proportional to 31,995.41, 44,143.79 and 20,671.20

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Solution

The fourth proportional to 31,995.41, 44,143.79 and 20,671.20 is: 28,519.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,995.41 : 44,143.79 = 20,671.20 : x
  2. Step 2: Convert to fraction form
    31,995.41/44,143.79 = 20,671.20/x
  3. Step 3: Cross multiply
    31,995.41x = 44,143.79 × 20,671.20
  4. Step 4: Simplify right side
    31,995.41x = 912,505,008.49
  5. Step 5: Solve for x
    x = 912,505,008.49/31,995.41
  6. Step 6: Final answer
    x = 28,519.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.