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Finding the Fourth Proportional to 6,874.87, 9,489.60 and 4,891.18

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Solution

The fourth proportional to 6,874.87, 9,489.60 and 4,891.18 is: 6,751.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,874.87 : 9,489.60 = 4,891.18 : x
  2. Step 2: Convert to fraction form
    6,874.87/9,489.60 = 4,891.18/x
  3. Step 3: Cross multiply
    6,874.87x = 9,489.60 × 4,891.18
  4. Step 4: Simplify right side
    6,874.87x = 46,415,341.73
  5. Step 5: Solve for x
    x = 46,415,341.73/6,874.87
  6. Step 6: Final answer
    x = 6,751.45

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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.