Home / 31,999.38-47,999.31-20,975.86

Finding the Fourth Proportional to 31,999.38, 47,999.31 and 20,975.86

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Solution

The fourth proportional to 31,999.38, 47,999.31 and 20,975.86 is: 31,463.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,999.38 : 47,999.31 = 20,975.86 : x
  2. Step 2: Convert to fraction form
    31,999.38/47,999.31 = 20,975.86/x
  3. Step 3: Cross multiply
    31,999.38x = 47,999.31 × 20,975.86
  4. Step 4: Simplify right side
    31,999.38x = 1,006,826,806.66
  5. Step 5: Solve for x
    x = 1,006,826,806.66/31,999.38
  6. Step 6: Final answer
    x = 31,463.95

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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.