Home / 31,825.20-47,755.08-20,729.28

Finding the Fourth Proportional to 31,825.20, 47,755.08 and 20,729.28

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Solution

The fourth proportional to 31,825.20, 47,755.08 and 20,729.28 is: 31,105.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,825.20 : 47,755.08 = 20,729.28 : x
  2. Step 2: Convert to fraction form
    31,825.20/47,755.08 = 20,729.28/x
  3. Step 3: Cross multiply
    31,825.20x = 47,755.08 × 20,729.28
  4. Step 4: Simplify right side
    31,825.20x = 989,928,424.74
  5. Step 5: Solve for x
    x = 989,928,424.74/31,825.20
  6. Step 6: Final answer
    x = 31,105.18

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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.