Home / 10,431.92-15,646.62-2,640.80

Finding the Fourth Proportional to 10,431.92, 15,646.62 and 2,640.80

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Solution

The fourth proportional to 10,431.92, 15,646.62 and 2,640.80 is: 3,960.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,431.92 : 15,646.62 = 2,640.80 : x
  2. Step 2: Convert to fraction form
    10,431.92/15,646.62 = 2,640.80/x
  3. Step 3: Cross multiply
    10,431.92x = 15,646.62 × 2,640.80
  4. Step 4: Simplify right side
    10,431.92x = 41,319,594.10
  5. Step 5: Solve for x
    x = 41,319,594.10/10,431.92
  6. Step 6: Final answer
    x = 3,960.88

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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.