Home / 31,982.80-47,909.40-18,115.60

Finding the Fourth Proportional to 31,982.80, 47,909.40 and 18,115.60

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Solution

The fourth proportional to 31,982.80, 47,909.40 and 18,115.60 is: 27,136.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,982.80 : 47,909.40 = 18,115.60 : x
  2. Step 2: Convert to fraction form
    31,982.80/47,909.40 = 18,115.60/x
  3. Step 3: Cross multiply
    31,982.80x = 47,909.40 × 18,115.60
  4. Step 4: Simplify right side
    31,982.80x = 867,907,526.64
  5. Step 5: Solve for x
    x = 867,907,526.64/31,982.80
  6. Step 6: Final answer
    x = 27,136.70

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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.