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Finding the Fourth Proportional to 6,687.88, 10,017.16 and 5,515.20

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Solution

The fourth proportional to 6,687.88, 10,017.16 and 5,515.20 is: 8,260.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,687.88 : 10,017.16 = 5,515.20 : x
  2. Step 2: Convert to fraction form
    6,687.88/10,017.16 = 5,515.20/x
  3. Step 3: Cross multiply
    6,687.88x = 10,017.16 × 5,515.20
  4. Step 4: Simplify right side
    6,687.88x = 55,246,640.83
  5. Step 5: Solve for x
    x = 55,246,640.83/6,687.88
  6. Step 6: Final answer
    x = 8,260.71

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1.5x scale

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.