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Finding the Fourth Proportional to 8,757.70, 12,085.90 and 4,981.42

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Solution

The fourth proportional to 8,757.70, 12,085.90 and 4,981.42 is: 6,874.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,757.70 : 12,085.90 = 4,981.42 : x
  2. Step 2: Convert to fraction form
    8,757.70/12,085.90 = 4,981.42/x
  3. Step 3: Cross multiply
    8,757.70x = 12,085.90 × 4,981.42
  4. Step 4: Simplify right side
    8,757.70x = 60,204,878.65
  5. Step 5: Solve for x
    x = 60,204,878.65/8,757.70
  6. Step 6: Final answer
    x = 6,874.51

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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.