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Finding the Fourth Proportional to 18,107.01, 25,029.51 and 15,105.36

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Solution

The fourth proportional to 18,107.01, 25,029.51 and 15,105.36 is: 20,880.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,107.01 : 25,029.51 = 15,105.36 : x
  2. Step 2: Convert to fraction form
    18,107.01/25,029.51 = 15,105.36/x
  3. Step 3: Cross multiply
    18,107.01x = 25,029.51 × 15,105.36
  4. Step 4: Simplify right side
    18,107.01x = 378,079,759.17
  5. Step 5: Solve for x
    x = 378,079,759.17/18,107.01
  6. Step 6: Final answer
    x = 20,880.30

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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.