Home / 13,912.12-20,876.69-7,669.45

Finding the Fourth Proportional to 13,912.12, 20,876.69 and 7,669.45

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Solution

The fourth proportional to 13,912.12, 20,876.69 and 7,669.45 is: 11,508.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,912.12 : 20,876.69 = 7,669.45 : x
  2. Step 2: Convert to fraction form
    13,912.12/20,876.69 = 7,669.45/x
  3. Step 3: Cross multiply
    13,912.12x = 20,876.69 × 7,669.45
  4. Step 4: Simplify right side
    13,912.12x = 160,112,730.12
  5. Step 5: Solve for x
    x = 160,112,730.12/13,912.12
  6. Step 6: Final answer
    x = 11,508.87

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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.