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Finding the Fourth Proportional to 7,049.78, 9,715.28 and 5,161.94

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Solution

The fourth proportional to 7,049.78, 9,715.28 and 5,161.94 is: 7,113.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,049.78 : 9,715.28 = 5,161.94 : x
  2. Step 2: Convert to fraction form
    7,049.78/9,715.28 = 5,161.94/x
  3. Step 3: Cross multiply
    7,049.78x = 9,715.28 × 5,161.94
  4. Step 4: Simplify right side
    7,049.78x = 50,149,692.44
  5. Step 5: Solve for x
    x = 50,149,692.44/7,049.78
  6. Step 6: Final answer
    x = 7,113.65

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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.