Home / 18,521.75-25,560.20-10,138.43

Finding the Fourth Proportional to 18,521.75, 25,560.20 and 10,138.43

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Solution

The fourth proportional to 18,521.75, 25,560.20 and 10,138.43 is: 13,991.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,521.75 : 25,560.20 = 10,138.43 : x
  2. Step 2: Convert to fraction form
    18,521.75/25,560.20 = 10,138.43/x
  3. Step 3: Cross multiply
    18,521.75x = 25,560.20 × 10,138.43
  4. Step 4: Simplify right side
    18,521.75x = 259,140,247.79
  5. Step 5: Solve for x
    x = 259,140,247.79/18,521.75
  6. Step 6: Final answer
    x = 13,991.13

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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.