Home / 8,511.92-12,743.16-5,215.04

Finding the Fourth Proportional to 8,511.92, 12,743.16 and 5,215.04

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Solution

The fourth proportional to 8,511.92, 12,743.16 and 5,215.04 is: 7,807.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,511.92 : 12,743.16 = 5,215.04 : x
  2. Step 2: Convert to fraction form
    8,511.92/12,743.16 = 5,215.04/x
  3. Step 3: Cross multiply
    8,511.92x = 12,743.16 × 5,215.04
  4. Step 4: Simplify right side
    8,511.92x = 66,456,089.13
  5. Step 5: Solve for x
    x = 66,456,089.13/8,511.92
  6. Step 6: Final answer
    x = 7,807.41

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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.