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Finding the Fourth Proportional to 7,321.52, 10,979.52 and 2,640.28

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Solution

The fourth proportional to 7,321.52, 10,979.52 and 2,640.28 is: 3,959.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,321.52 : 10,979.52 = 2,640.28 : x
  2. Step 2: Convert to fraction form
    7,321.52/10,979.52 = 2,640.28/x
  3. Step 3: Cross multiply
    7,321.52x = 10,979.52 × 2,640.28
  4. Step 4: Simplify right side
    7,321.52x = 28,989,007.07
  5. Step 5: Solve for x
    x = 28,989,007.07/7,321.52
  6. Step 6: Final answer
    x = 3,959.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.