Home / 8,872.40-12,249.66-5,518.88

Finding the Fourth Proportional to 8,872.40, 12,249.66 and 5,518.88

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Solution

The fourth proportional to 8,872.40, 12,249.66 and 5,518.88 is: 7,619.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,872.40 : 12,249.66 = 5,518.88 : x
  2. Step 2: Convert to fraction form
    8,872.40/12,249.66 = 5,518.88/x
  3. Step 3: Cross multiply
    8,872.40x = 12,249.66 × 5,518.88
  4. Step 4: Simplify right side
    8,872.40x = 67,604,403.58
  5. Step 5: Solve for x
    x = 67,604,403.58/8,872.40
  6. Step 6: Final answer
    x = 7,619.63

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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.