Home / 12,191.35-16,823.19-7,155.78

Finding the Fourth Proportional to 12,191.35, 16,823.19 and 7,155.78

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Solution

The fourth proportional to 12,191.35, 16,823.19 and 7,155.78 is: 9,874.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,191.35 : 16,823.19 = 7,155.78 : x
  2. Step 2: Convert to fraction form
    12,191.35/16,823.19 = 7,155.78/x
  3. Step 3: Cross multiply
    12,191.35x = 16,823.19 × 7,155.78
  4. Step 4: Simplify right side
    12,191.35x = 120,383,046.54
  5. Step 5: Solve for x
    x = 120,383,046.54/12,191.35
  6. Step 6: Final answer
    x = 9,874.46

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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.