Home / 8,680.83-11,979.77-5,321.72

Finding the Fourth Proportional to 8,680.83, 11,979.77 and 5,321.72

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Solution

The fourth proportional to 8,680.83, 11,979.77 and 5,321.72 is: 7,344.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,680.83 : 11,979.77 = 5,321.72 : x
  2. Step 2: Convert to fraction form
    8,680.83/11,979.77 = 5,321.72/x
  3. Step 3: Cross multiply
    8,680.83x = 11,979.77 × 5,321.72
  4. Step 4: Simplify right side
    8,680.83x = 63,752,895.10
  5. Step 5: Solve for x
    x = 63,752,895.10/8,680.83
  6. Step 6: Final answer
    x = 7,344.10

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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.