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Finding the Fourth Proportional to 7,278.76, 10,042.50 and 4,134.92

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Solution

The fourth proportional to 7,278.76, 10,042.50 and 4,134.92 is: 5,704.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,278.76 : 10,042.50 = 4,134.92 : x
  2. Step 2: Convert to fraction form
    7,278.76/10,042.50 = 4,134.92/x
  3. Step 3: Cross multiply
    7,278.76x = 10,042.50 × 4,134.92
  4. Step 4: Simplify right side
    7,278.76x = 41,524,934.10
  5. Step 5: Solve for x
    x = 41,524,934.10/7,278.76
  6. Step 6: Final answer
    x = 5,704.95

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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.