Home / 8,718.40-13,081.38-3,789.28

Finding the Fourth Proportional to 8,718.40, 13,081.38 and 3,789.28

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Solution

The fourth proportional to 8,718.40, 13,081.38 and 3,789.28 is: 5,685.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,718.40 : 13,081.38 = 3,789.28 : x
  2. Step 2: Convert to fraction form
    8,718.40/13,081.38 = 3,789.28/x
  3. Step 3: Cross multiply
    8,718.40x = 13,081.38 × 3,789.28
  4. Step 4: Simplify right side
    8,718.40x = 49,569,011.61
  5. Step 5: Solve for x
    x = 49,569,011.61/8,718.40
  6. Step 6: Final answer
    x = 5,685.56

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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.