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Finding the Fourth Proportional to 18,831, 25,991.38 and 10,872.04

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Solution

The fourth proportional to 18,831, 25,991.38 and 10,872.04 is: 15,006.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,831 : 25,991.38 = 10,872.04 : x
  2. Step 2: Convert to fraction form
    18,831/25,991.38 = 10,872.04/x
  3. Step 3: Cross multiply
    18,831x = 25,991.38 × 10,872.04
  4. Step 4: Simplify right side
    18,831x = 282,579,323.02
  5. Step 5: Solve for x
    x = 282,579,323.02/18,831
  6. Step 6: Final answer
    x = 15,006.07

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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.