Home / 13,129.68-18,119.24-7,542.48

Finding the Fourth Proportional to 13,129.68, 18,119.24 and 7,542.48

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Solution

The fourth proportional to 13,129.68, 18,119.24 and 7,542.48 is: 10,408.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,129.68 : 18,119.24 = 7,542.48 : x
  2. Step 2: Convert to fraction form
    13,129.68/18,119.24 = 7,542.48/x
  3. Step 3: Cross multiply
    13,129.68x = 18,119.24 × 7,542.48
  4. Step 4: Simplify right side
    13,129.68x = 136,664,005.32
  5. Step 5: Solve for x
    x = 136,664,005.32/13,129.68
  6. Step 6: Final answer
    x = 10,408.78

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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.