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Finding the Fourth Proportional to 7,115.20, 10,672.80 and 6,750.70

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Solution

The fourth proportional to 7,115.20, 10,672.80 and 6,750.70 is: 10,126.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,115.20 : 10,672.80 = 6,750.70 : x
  2. Step 2: Convert to fraction form
    7,115.20/10,672.80 = 6,750.70/x
  3. Step 3: Cross multiply
    7,115.20x = 10,672.80 × 6,750.70
  4. Step 4: Simplify right side
    7,115.20x = 72,048,870.96
  5. Step 5: Solve for x
    x = 72,048,870.96/7,115.20
  6. Step 6: Final answer
    x = 10,126.05

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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.