Home / 18,126.20-25,022.70-12,161.76

Finding the Fourth Proportional to 18,126.20, 25,022.70 and 12,161.76

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Solution

The fourth proportional to 18,126.20, 25,022.70 and 12,161.76 is: 16,788.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,126.20 : 25,022.70 = 12,161.76 : x
  2. Step 2: Convert to fraction form
    18,126.20/25,022.70 = 12,161.76/x
  3. Step 3: Cross multiply
    18,126.20x = 25,022.70 × 12,161.76
  4. Step 4: Simplify right side
    18,126.20x = 304,320,071.95
  5. Step 5: Solve for x
    x = 304,320,071.95/18,126.20
  6. Step 6: Final answer
    x = 16,788.97

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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.