Home / 10,947.38-15,107.40-5,979.38

Finding the Fourth Proportional to 10,947.38, 15,107.40 and 5,979.38

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Solution

The fourth proportional to 10,947.38, 15,107.40 and 5,979.38 is: 8,251.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,947.38 : 15,107.40 = 5,979.38 : x
  2. Step 2: Convert to fraction form
    10,947.38/15,107.40 = 5,979.38/x
  3. Step 3: Cross multiply
    10,947.38x = 15,107.40 × 5,979.38
  4. Step 4: Simplify right side
    10,947.38x = 90,332,809.88
  5. Step 5: Solve for x
    x = 90,332,809.88/10,947.38
  6. Step 6: Final answer
    x = 8,251.55

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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.