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Finding the Fourth Proportional to 8,876.68, 13,315.08 and 3,945

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Solution

The fourth proportional to 8,876.68, 13,315.08 and 3,945 is: 5,917.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,876.68 : 13,315.08 = 3,945 : x
  2. Step 2: Convert to fraction form
    8,876.68/13,315.08 = 3,945/x
  3. Step 3: Cross multiply
    8,876.68x = 13,315.08 × 3,945
  4. Step 4: Simplify right side
    8,876.68x = 52,527,990.60
  5. Step 5: Solve for x
    x = 52,527,990.60/8,876.68
  6. Step 6: Final answer
    x = 5,917.53

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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.