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Finding the Fourth Proportional to 8,718.88, 13,079.22 and 3,787.12

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Solution

The fourth proportional to 8,718.88, 13,079.22 and 3,787.12 is: 5,681.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,718.88 : 13,079.22 = 3,787.12 : x
  2. Step 2: Convert to fraction form
    8,718.88/13,079.22 = 3,787.12/x
  3. Step 3: Cross multiply
    8,718.88x = 13,079.22 × 3,787.12
  4. Step 4: Simplify right side
    8,718.88x = 49,532,575.65
  5. Step 5: Solve for x
    x = 49,532,575.65/8,718.88
  6. Step 6: Final answer
    x = 5,681.07

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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.