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Finding the Fourth Proportional to 8,878.70, 12,253.20 and 5,103.10

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Solution

The fourth proportional to 8,878.70, 12,253.20 and 5,103.10 is: 7,042.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,878.70 : 12,253.20 = 5,103.10 : x
  2. Step 2: Convert to fraction form
    8,878.70/12,253.20 = 5,103.10/x
  3. Step 3: Cross multiply
    8,878.70x = 12,253.20 × 5,103.10
  4. Step 4: Simplify right side
    8,878.70x = 62,529,243.65
  5. Step 5: Solve for x
    x = 62,529,243.65/8,878.70
  6. Step 6: Final answer
    x = 7,042.61

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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.