Home / 20,306.31-30,382.92-11,990.85

Finding the Fourth Proportional to 20,306.31, 30,382.92 and 11,990.85

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Solution

The fourth proportional to 20,306.31, 30,382.92 and 11,990.85 is: 17,941.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,306.31 : 30,382.92 = 11,990.85 : x
  2. Step 2: Convert to fraction form
    20,306.31/30,382.92 = 11,990.85/x
  3. Step 3: Cross multiply
    20,306.31x = 30,382.92 × 11,990.85
  4. Step 4: Simplify right side
    20,306.31x = 364,317,036.28
  5. Step 5: Solve for x
    x = 364,317,036.28/20,306.31
  6. Step 6: Final answer
    x = 17,941.08

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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.