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Finding the Fourth Proportional to 8,718.72, 12,034.92 and 5,181.92

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Solution

The fourth proportional to 8,718.72, 12,034.92 and 5,181.92 is: 7,152.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,718.72 : 12,034.92 = 5,181.92 : x
  2. Step 2: Convert to fraction form
    8,718.72/12,034.92 = 5,181.92/x
  3. Step 3: Cross multiply
    8,718.72x = 12,034.92 × 5,181.92
  4. Step 4: Simplify right side
    8,718.72x = 62,363,992.65
  5. Step 5: Solve for x
    x = 62,363,992.65/8,718.72
  6. Step 6: Final answer
    x = 7,152.88

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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.