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Finding the Fourth Proportional to 18,426.24, 25,434 and 10,872.24

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Solution

The fourth proportional to 18,426.24, 25,434 and 10,872.24 is: 15,007.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,426.24 : 25,434 = 10,872.24 : x
  2. Step 2: Convert to fraction form
    18,426.24/25,434 = 10,872.24/x
  3. Step 3: Cross multiply
    18,426.24x = 25,434 × 10,872.24
  4. Step 4: Simplify right side
    18,426.24x = 276,524,552.16
  5. Step 5: Solve for x
    x = 276,524,552.16/18,426.24
  6. Step 6: Final answer
    x = 15,007.11

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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.