Home / 13,144.29-18,138.88-7,478.92

Finding the Fourth Proportional to 13,144.29, 18,138.88 and 7,478.92

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Solution

The fourth proportional to 13,144.29, 18,138.88 and 7,478.92 is: 10,320.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,144.29 : 18,138.88 = 7,478.92 : x
  2. Step 2: Convert to fraction form
    13,144.29/18,138.88 = 7,478.92/x
  3. Step 3: Cross multiply
    13,144.29x = 18,138.88 × 7,478.92
  4. Step 4: Simplify right side
    13,144.29x = 135,659,104.32
  5. Step 5: Solve for x
    x = 135,659,104.32/13,144.29
  6. Step 6: Final answer
    x = 10,320.76

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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.