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Finding the Fourth Proportional to 8,375.39, 12,576.14 and 7,218.40

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Solution

The fourth proportional to 8,375.39, 12,576.14 and 7,218.40 is: 10,838.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,375.39 : 12,576.14 = 7,218.40 : x
  2. Step 2: Convert to fraction form
    8,375.39/12,576.14 = 7,218.40/x
  3. Step 3: Cross multiply
    8,375.39x = 12,576.14 × 7,218.40
  4. Step 4: Simplify right side
    8,375.39x = 90,779,608.98
  5. Step 5: Solve for x
    x = 90,779,608.98/8,375.39
  6. Step 6: Final answer
    x = 10,838.85

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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.