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Finding the Fourth Proportional to 8,581.65, 12,879.86 and 4,891.29

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Solution

The fourth proportional to 8,581.65, 12,879.86 and 4,891.29 is: 7,341.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,581.65 : 12,879.86 = 4,891.29 : x
  2. Step 2: Convert to fraction form
    8,581.65/12,879.86 = 4,891.29/x
  3. Step 3: Cross multiply
    8,581.65x = 12,879.86 × 4,891.29
  4. Step 4: Simplify right side
    8,581.65x = 62,999,130.42
  5. Step 5: Solve for x
    x = 62,999,130.42/8,581.65
  6. Step 6: Final answer
    x = 7,341.14

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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.