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Finding the Fourth Proportional to 6,989.55, 10,489.19 and 2,610.87

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Solution

The fourth proportional to 6,989.55, 10,489.19 and 2,610.87 is: 3,918.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,989.55 : 10,489.19 = 2,610.87 : x
  2. Step 2: Convert to fraction form
    6,989.55/10,489.19 = 2,610.87/x
  3. Step 3: Cross multiply
    6,989.55x = 10,489.19 × 2,610.87
  4. Step 4: Simplify right side
    6,989.55x = 27,385,898.44
  5. Step 5: Solve for x
    x = 27,385,898.44/6,989.55
  6. Step 6: Final answer
    x = 3,918.12

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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.