Home / 10,979.20-15,152.96-7,001.92

Finding the Fourth Proportional to 10,979.20, 15,152.96 and 7,001.92

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Solution

The fourth proportional to 10,979.20, 15,152.96 and 7,001.92 is: 9,663.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,979.20 : 15,152.96 = 7,001.92 : x
  2. Step 2: Convert to fraction form
    10,979.20/15,152.96 = 7,001.92/x
  3. Step 3: Cross multiply
    10,979.20x = 15,152.96 × 7,001.92
  4. Step 4: Simplify right side
    10,979.20x = 106,099,813.68
  5. Step 5: Solve for x
    x = 106,099,813.68/10,979.20
  6. Step 6: Final answer
    x = 9,663.71

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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.