Home / 13,749.57-18,971.13-8,371.95

Finding the Fourth Proportional to 13,749.57, 18,971.13 and 8,371.95

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Solution

The fourth proportional to 13,749.57, 18,971.13 and 8,371.95 is: 11,551.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,749.57 : 18,971.13 = 8,371.95 : x
  2. Step 2: Convert to fraction form
    13,749.57/18,971.13 = 8,371.95/x
  3. Step 3: Cross multiply
    13,749.57x = 18,971.13 × 8,371.95
  4. Step 4: Simplify right side
    13,749.57x = 158,825,249.27
  5. Step 5: Solve for x
    x = 158,825,249.27/13,749.57
  6. Step 6: Final answer
    x = 11,551.29

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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.