Home / 8,680.50-11,979.32-5,321.38

Finding the Fourth Proportional to 8,680.50, 11,979.32 and 5,321.38

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Solution

The fourth proportional to 8,680.50, 11,979.32 and 5,321.38 is: 7,343.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,680.50 : 11,979.32 = 5,321.38 : x
  2. Step 2: Convert to fraction form
    8,680.50/11,979.32 = 5,321.38/x
  3. Step 3: Cross multiply
    8,680.50x = 11,979.32 × 5,321.38
  4. Step 4: Simplify right side
    8,680.50x = 63,746,497.22
  5. Step 5: Solve for x
    x = 63,746,497.22/8,680.50
  6. Step 6: Final answer
    x = 7,343.64

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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.