Home / 13,119.80-18,105.68-7,151.56

Finding the Fourth Proportional to 13,119.80, 18,105.68 and 7,151.56

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Solution

The fourth proportional to 13,119.80, 18,105.68 and 7,151.56 is: 9,869.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,119.80 : 18,105.68 = 7,151.56 : x
  2. Step 2: Convert to fraction form
    13,119.80/18,105.68 = 7,151.56/x
  3. Step 3: Cross multiply
    13,119.80x = 18,105.68 × 7,151.56
  4. Step 4: Simplify right side
    13,119.80x = 129,483,856.86
  5. Step 5: Solve for x
    x = 129,483,856.86/13,119.80
  6. Step 6: Final answer
    x = 9,869.35

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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.