Home / 13,778.10-20,669.88-5,456.57

Finding the Fourth Proportional to 13,778.10, 20,669.88 and 5,456.57

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Solution

The fourth proportional to 13,778.10, 20,669.88 and 5,456.57 is: 8,185.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,778.10 : 20,669.88 = 5,456.57 : x
  2. Step 2: Convert to fraction form
    13,778.10/20,669.88 = 5,456.57/x
  3. Step 3: Cross multiply
    13,778.10x = 20,669.88 × 5,456.57
  4. Step 4: Simplify right side
    13,778.10x = 112,786,564.22
  5. Step 5: Solve for x
    x = 112,786,564.22/13,778.10
  6. Step 6: Final answer
    x = 8,185.93

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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.