Home / 31,475.20-47,201.92-13,957.28

Finding the Fourth Proportional to 31,475.20, 47,201.92 and 13,957.28

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Solution

The fourth proportional to 31,475.20, 47,201.92 and 13,957.28 is: 20,931.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,475.20 : 47,201.92 = 13,957.28 : x
  2. Step 2: Convert to fraction form
    31,475.20/47,201.92 = 13,957.28/x
  3. Step 3: Cross multiply
    31,475.20x = 47,201.92 × 13,957.28
  4. Step 4: Simplify right side
    31,475.20x = 658,810,413.98
  5. Step 5: Solve for x
    x = 658,810,413.98/31,475.20
  6. Step 6: Final answer
    x = 20,931.10

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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.