Home / 19,839.18-29,770.92-7,990.78

Finding the Fourth Proportional to 19,839.18, 29,770.92 and 7,990.78

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Solution

The fourth proportional to 19,839.18, 29,770.92 and 7,990.78 is: 11,991.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,839.18 : 29,770.92 = 7,990.78 : x
  2. Step 2: Convert to fraction form
    19,839.18/29,770.92 = 7,990.78/x
  3. Step 3: Cross multiply
    19,839.18x = 29,770.92 × 7,990.78
  4. Step 4: Simplify right side
    19,839.18x = 237,892,872.12
  5. Step 5: Solve for x
    x = 237,892,872.12/19,839.18
  6. Step 6: Final answer
    x = 11,991.06

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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.