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Finding the Fourth Proportional to 6,862.87, 9,470.64 and 3,879.10

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Solution

The fourth proportional to 6,862.87, 9,470.64 and 3,879.10 is: 5,353.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,862.87 : 9,470.64 = 3,879.10 : x
  2. Step 2: Convert to fraction form
    6,862.87/9,470.64 = 3,879.10/x
  3. Step 3: Cross multiply
    6,862.87x = 9,470.64 × 3,879.10
  4. Step 4: Simplify right side
    6,862.87x = 36,737,559.62
  5. Step 5: Solve for x
    x = 36,737,559.62/6,862.87
  6. Step 6: Final answer
    x = 5,353.09

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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.