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Finding the Fourth Proportional to 8,655.80, 12,983.42 and 3,109.48

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Solution

The fourth proportional to 8,655.80, 12,983.42 and 3,109.48 is: 4,664.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,655.80 : 12,983.42 = 3,109.48 : x
  2. Step 2: Convert to fraction form
    8,655.80/12,983.42 = 3,109.48/x
  3. Step 3: Cross multiply
    8,655.80x = 12,983.42 × 3,109.48
  4. Step 4: Simplify right side
    8,655.80x = 40,371,684.82
  5. Step 5: Solve for x
    x = 40,371,684.82/8,655.80
  6. Step 6: Final answer
    x = 4,664.12

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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.