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Finding the Fourth Proportional to 8,878.70, 12,245.54 and 5,519.53

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Solution

The fourth proportional to 8,878.70, 12,245.54 and 5,519.53 is: 7,612.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,878.70 : 12,245.54 = 5,519.53 : x
  2. Step 2: Convert to fraction form
    8,878.70/12,245.54 = 5,519.53/x
  3. Step 3: Cross multiply
    8,878.70x = 12,245.54 × 5,519.53
  4. Step 4: Simplify right side
    8,878.70x = 67,589,625.40
  5. Step 5: Solve for x
    x = 67,589,625.40/8,878.70
  6. Step 6: Final answer
    x = 7,612.56

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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.