Home / 31,974.20-47,982.90-20,853.80

Finding the Fourth Proportional to 31,974.20, 47,982.90 and 20,853.80

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Solution

The fourth proportional to 31,974.20, 47,982.90 and 20,853.80 is: 31,294.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,974.20 : 47,982.90 = 20,853.80 : x
  2. Step 2: Convert to fraction form
    31,974.20/47,982.90 = 20,853.80/x
  3. Step 3: Cross multiply
    31,974.20x = 47,982.90 × 20,853.80
  4. Step 4: Simplify right side
    31,974.20x = 1,000,625,800.02
  5. Step 5: Solve for x
    x = 1,000,625,800.02/31,974.20
  6. Step 6: Final answer
    x = 31,294.79

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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.