Home / 10,979.43-15,148.13-6,728.29

Finding the Fourth Proportional to 10,979.43, 15,148.13 and 6,728.29

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Solution

The fourth proportional to 10,979.43, 15,148.13 and 6,728.29 is: 9,282.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,979.43 : 15,148.13 = 6,728.29 : x
  2. Step 2: Convert to fraction form
    10,979.43/15,148.13 = 6,728.29/x
  3. Step 3: Cross multiply
    10,979.43x = 15,148.13 × 6,728.29
  4. Step 4: Simplify right side
    10,979.43x = 101,921,011.60
  5. Step 5: Solve for x
    x = 101,921,011.60/10,979.43
  6. Step 6: Final answer
    x = 9,282.91

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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.