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Finding the Fourth Proportional to 8,443.80, 12,669.30 and 5,326.20

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Solution

The fourth proportional to 8,443.80, 12,669.30 and 5,326.20 is: 7,991.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,443.80 : 12,669.30 = 5,326.20 : x
  2. Step 2: Convert to fraction form
    8,443.80/12,669.30 = 5,326.20/x
  3. Step 3: Cross multiply
    8,443.80x = 12,669.30 × 5,326.20
  4. Step 4: Simplify right side
    8,443.80x = 67,479,225.66
  5. Step 5: Solve for x
    x = 67,479,225.66/8,443.80
  6. Step 6: Final answer
    x = 7,991.57

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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.