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Finding the Fourth Proportional to 7,278.08, 10,917.12 and 2,658.56

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Solution

The fourth proportional to 7,278.08, 10,917.12 and 2,658.56 is: 3,987.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,278.08 : 10,917.12 = 2,658.56 : x
  2. Step 2: Convert to fraction form
    7,278.08/10,917.12 = 2,658.56/x
  3. Step 3: Cross multiply
    7,278.08x = 10,917.12 × 2,658.56
  4. Step 4: Simplify right side
    7,278.08x = 29,023,818.55
  5. Step 5: Solve for x
    x = 29,023,818.55/7,278.08
  6. Step 6: Final answer
    x = 3,987.84

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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.