Home / 31,891.20-47,793.60-21,331.20

Finding the Fourth Proportional to 31,891.20, 47,793.60 and 21,331.20

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Solution

The fourth proportional to 31,891.20, 47,793.60 and 21,331.20 is: 31,967.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,891.20 : 47,793.60 = 21,331.20 : x
  2. Step 2: Convert to fraction form
    31,891.20/47,793.60 = 21,331.20/x
  3. Step 3: Cross multiply
    31,891.20x = 47,793.60 × 21,331.20
  4. Step 4: Simplify right side
    31,891.20x = 1,019,494,840.32
  5. Step 5: Solve for x
    x = 1,019,494,840.32/31,891.20
  6. Step 6: Final answer
    x = 31,967.90

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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.