Home / 13,144.10-18,138.62-7,478.73

Finding the Fourth Proportional to 13,144.10, 18,138.62 and 7,478.73

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Solution

The fourth proportional to 13,144.10, 18,138.62 and 7,478.73 is: 10,320.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,144.10 : 18,138.62 = 7,478.73 : x
  2. Step 2: Convert to fraction form
    13,144.10/18,138.62 = 7,478.73/x
  3. Step 3: Cross multiply
    13,144.10x = 18,138.62 × 7,478.73
  4. Step 4: Simplify right side
    13,144.10x = 135,653,750.86
  5. Step 5: Solve for x
    x = 135,653,750.86/13,144.10
  6. Step 6: Final answer
    x = 10,320.51

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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.