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Finding the Fourth Proportional to 8,655.81, 12,988.50 and 4,273.61

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Solution

The fourth proportional to 8,655.81, 12,988.50 and 4,273.61 is: 6,412.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,655.81 : 12,988.50 = 4,273.61 : x
  2. Step 2: Convert to fraction form
    8,655.81/12,988.50 = 4,273.61/x
  3. Step 3: Cross multiply
    8,655.81x = 12,988.50 × 4,273.61
  4. Step 4: Simplify right side
    8,655.81x = 55,507,799.62
  5. Step 5: Solve for x
    x = 55,507,799.62/8,655.81
  6. Step 6: Final answer
    x = 6,412.78

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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.