Home / 13,705.38-18,912.11-10,879.59

Finding the Fourth Proportional to 13,705.38, 18,912.11 and 10,879.59

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Solution

The fourth proportional to 13,705.38, 18,912.11 and 10,879.59 is: 15,012.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,705.38 : 18,912.11 = 10,879.59 : x
  2. Step 2: Convert to fraction form
    13,705.38/18,912.11 = 10,879.59/x
  3. Step 3: Cross multiply
    13,705.38x = 18,912.11 × 10,879.59
  4. Step 4: Simplify right side
    13,705.38x = 205,756,002.83
  5. Step 5: Solve for x
    x = 205,756,002.83/13,705.38
  6. Step 6: Final answer
    x = 15,012.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.