Home / 31,986.10-47,979.15-20,905.30

Finding the Fourth Proportional to 31,986.10, 47,979.15 and 20,905.30

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Solution

The fourth proportional to 31,986.10, 47,979.15 and 20,905.30 is: 31,357.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,986.10 : 47,979.15 = 20,905.30 : x
  2. Step 2: Convert to fraction form
    31,986.10/47,979.15 = 20,905.30/x
  3. Step 3: Cross multiply
    31,986.10x = 47,979.15 × 20,905.30
  4. Step 4: Simplify right side
    31,986.10x = 1,003,018,524.50
  5. Step 5: Solve for x
    x = 1,003,018,524.50/31,986.10
  6. Step 6: Final answer
    x = 31,357.95

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Similar ratio
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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.