Home / 13,749.62-18,974.76-7,781.29

Finding the Fourth Proportional to 13,749.62, 18,974.76 and 7,781.29

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Solution

The fourth proportional to 13,749.62, 18,974.76 and 7,781.29 is: 10,738.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,749.62 : 18,974.76 = 7,781.29 : x
  2. Step 2: Convert to fraction form
    13,749.62/18,974.76 = 7,781.29/x
  3. Step 3: Cross multiply
    13,749.62x = 18,974.76 × 7,781.29
  4. Step 4: Simplify right side
    13,749.62x = 147,647,995.91
  5. Step 5: Solve for x
    x = 147,647,995.91/13,749.62
  6. Step 6: Final answer
    x = 10,738.33

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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.