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Finding the Fourth Proportional to 4,881.95, 6,737.18 and 2,891.78

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Solution

The fourth proportional to 4,881.95, 6,737.18 and 2,891.78 is: 3,990.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,881.95 : 6,737.18 = 2,891.78 : x
  2. Step 2: Convert to fraction form
    4,881.95/6,737.18 = 2,891.78/x
  3. Step 3: Cross multiply
    4,881.95x = 6,737.18 × 2,891.78
  4. Step 4: Simplify right side
    4,881.95x = 19,482,442.38
  5. Step 5: Solve for x
    x = 19,482,442.38/4,881.95
  6. Step 6: Final answer
    x = 3,990.71

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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.