Home / 13,775.82-20,665.33-5,456.57

Finding the Fourth Proportional to 13,775.82, 20,665.33 and 5,456.57

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Solution

The fourth proportional to 13,775.82, 20,665.33 and 5,456.57 is: 8,185.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,775.82 : 20,665.33 = 5,456.57 : x
  2. Step 2: Convert to fraction form
    13,775.82/20,665.33 = 5,456.57/x
  3. Step 3: Cross multiply
    13,775.82x = 20,665.33 × 5,456.57
  4. Step 4: Simplify right side
    13,775.82x = 112,761,702.75
  5. Step 5: Solve for x
    x = 112,761,702.75/13,775.82
  6. Step 6: Final answer
    x = 8,185.48

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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.