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Finding the Fourth Proportional to 8,898.29, 12,278.57 and 4,918.85

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Solution

The fourth proportional to 8,898.29, 12,278.57 and 4,918.85 is: 6,787.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,898.29 : 12,278.57 = 4,918.85 : x
  2. Step 2: Convert to fraction form
    8,898.29/12,278.57 = 4,918.85/x
  3. Step 3: Cross multiply
    8,898.29x = 12,278.57 × 4,918.85
  4. Step 4: Simplify right side
    8,898.29x = 60,396,450.15
  5. Step 5: Solve for x
    x = 60,396,450.15/8,898.29
  6. Step 6: Final answer
    x = 6,787.43

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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.