Home / 9,138.88-12,616.40-6,339.52

Finding the Fourth Proportional to 9,138.88, 12,616.40 and 6,339.52

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Solution

The fourth proportional to 9,138.88, 12,616.40 and 6,339.52 is: 8,751.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,138.88 : 12,616.40 = 6,339.52 : x
  2. Step 2: Convert to fraction form
    9,138.88/12,616.40 = 6,339.52/x
  3. Step 3: Cross multiply
    9,138.88x = 12,616.40 × 6,339.52
  4. Step 4: Simplify right side
    9,138.88x = 79,981,920.13
  5. Step 5: Solve for x
    x = 79,981,920.13/9,138.88
  6. Step 6: Final answer
    x = 8,751.83

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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.