Home / 5,639.11-8,456.33-2,128.52

Finding the Fourth Proportional to 5,639.11, 8,456.33 and 2,128.52

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Solution

The fourth proportional to 5,639.11, 8,456.33 and 2,128.52 is: 3,191.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,639.11 : 8,456.33 = 2,128.52 : x
  2. Step 2: Convert to fraction form
    5,639.11/8,456.33 = 2,128.52/x
  3. Step 3: Cross multiply
    5,639.11x = 8,456.33 × 2,128.52
  4. Step 4: Simplify right side
    5,639.11x = 17,999,467.53
  5. Step 5: Solve for x
    x = 17,999,467.53/5,639.11
  6. Step 6: Final answer
    x = 3,191.90

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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.