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Finding the Fourth Proportional to 8,664.77, 12,999.68 and 3,117.99

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Solution

The fourth proportional to 8,664.77, 12,999.68 and 3,117.99 is: 4,677.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,664.77 : 12,999.68 = 3,117.99 : x
  2. Step 2: Convert to fraction form
    8,664.77/12,999.68 = 3,117.99/x
  3. Step 3: Cross multiply
    8,664.77x = 12,999.68 × 3,117.99
  4. Step 4: Simplify right side
    8,664.77x = 40,532,856.65
  5. Step 5: Solve for x
    x = 40,532,856.65/8,664.77
  6. Step 6: Final answer
    x = 4,677.89

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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.