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Finding the Fourth Proportional to 8,819.66, 12,169.22 and 5,091.50

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Solution

The fourth proportional to 8,819.66, 12,169.22 and 5,091.50 is: 7,025.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,819.66 : 12,169.22 = 5,091.50 : x
  2. Step 2: Convert to fraction form
    8,819.66/12,169.22 = 5,091.50/x
  3. Step 3: Cross multiply
    8,819.66x = 12,169.22 × 5,091.50
  4. Step 4: Simplify right side
    8,819.66x = 61,959,583.63
  5. Step 5: Solve for x
    x = 61,959,583.63/8,819.66
  6. Step 6: Final answer
    x = 7,025.17

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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.