Home / 15,382.80-21,229.85-9,418.43

Finding the Fourth Proportional to 15,382.80, 21,229.85 and 9,418.43

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Solution

The fourth proportional to 15,382.80, 21,229.85 and 9,418.43 is: 12,998.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,382.80 : 21,229.85 = 9,418.43 : x
  2. Step 2: Convert to fraction form
    15,382.80/21,229.85 = 9,418.43/x
  3. Step 3: Cross multiply
    15,382.80x = 21,229.85 × 9,418.43
  4. Step 4: Simplify right side
    15,382.80x = 199,951,702.89
  5. Step 5: Solve for x
    x = 199,951,702.89/15,382.80
  6. Step 6: Final answer
    x = 12,998.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.