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Finding the Fourth Proportional to 7,427, 10,249.26 and 4,115

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Solution

The fourth proportional to 7,427, 10,249.26 and 4,115 is: 5,678.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,427 : 10,249.26 = 4,115 : x
  2. Step 2: Convert to fraction form
    7,427/10,249.26 = 4,115/x
  3. Step 3: Cross multiply
    7,427x = 10,249.26 × 4,115
  4. Step 4: Simplify right side
    7,427x = 42,175,704.90
  5. Step 5: Solve for x
    x = 42,175,704.90/7,427
  6. Step 6: Final answer
    x = 5,678.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.