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Finding the Fourth Proportional to 7,249.67, 10,000.68 and 5,478.20

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Solution

The fourth proportional to 7,249.67, 10,000.68 and 5,478.20 is: 7,556.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,249.67 : 10,000.68 = 5,478.20 : x
  2. Step 2: Convert to fraction form
    7,249.67/10,000.68 = 5,478.20/x
  3. Step 3: Cross multiply
    7,249.67x = 10,000.68 × 5,478.20
  4. Step 4: Simplify right side
    7,249.67x = 54,785,675.17
  5. Step 5: Solve for x
    x = 54,785,675.17/7,249.67
  6. Step 6: Final answer
    x = 7,556.99

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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.