Home / 15,177.20-20,947.89-9,862.79

Finding the Fourth Proportional to 15,177.20, 20,947.89 and 9,862.79

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Solution

The fourth proportional to 15,177.20, 20,947.89 and 9,862.79 is: 13,612.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,177.20 : 20,947.89 = 9,862.79 : x
  2. Step 2: Convert to fraction form
    15,177.20/20,947.89 = 9,862.79/x
  3. Step 3: Cross multiply
    15,177.20x = 20,947.89 × 9,862.79
  4. Step 4: Simplify right side
    15,177.20x = 206,604,640.01
  5. Step 5: Solve for x
    x = 206,604,640.01/15,177.20
  6. Step 6: Final answer
    x = 13,612.83

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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.