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Finding the Fourth Proportional to 18,118.80, 25,005.02 and 10,161.47

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Solution

The fourth proportional to 18,118.80, 25,005.02 and 10,161.47 is: 14,023.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,118.80 : 25,005.02 = 10,161.47 : x
  2. Step 2: Convert to fraction form
    18,118.80/25,005.02 = 10,161.47/x
  3. Step 3: Cross multiply
    18,118.80x = 25,005.02 × 10,161.47
  4. Step 4: Simplify right side
    18,118.80x = 254,087,584.75
  5. Step 5: Solve for x
    x = 254,087,584.75/18,118.80
  6. Step 6: Final answer
    x = 14,023.42

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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.