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Finding the Fourth Proportional to 8,896.95, 12,278.37 and 5,120.58

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Solution

The fourth proportional to 8,896.95, 12,278.37 and 5,120.58 is: 7,066.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,896.95 : 12,278.37 = 5,120.58 : x
  2. Step 2: Convert to fraction form
    8,896.95/12,278.37 = 5,120.58/x
  3. Step 3: Cross multiply
    8,896.95x = 12,278.37 × 5,120.58
  4. Step 4: Simplify right side
    8,896.95x = 62,872,375.85
  5. Step 5: Solve for x
    x = 62,872,375.85/8,896.95
  6. Step 6: Final answer
    x = 7,066.73

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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.