Home / 12,387.20-17,096.95-7,910.18

Finding the Fourth Proportional to 12,387.20, 17,096.95 and 7,910.18

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Solution

The fourth proportional to 12,387.20, 17,096.95 and 7,910.18 is: 10,917.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,387.20 : 17,096.95 = 7,910.18 : x
  2. Step 2: Convert to fraction form
    12,387.20/17,096.95 = 7,910.18/x
  3. Step 3: Cross multiply
    12,387.20x = 17,096.95 × 7,910.18
  4. Step 4: Simplify right side
    12,387.20x = 135,239,826.92
  5. Step 5: Solve for x
    x = 135,239,826.92/12,387.20
  6. Step 6: Final answer
    x = 10,917.71

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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.