Home / 18,949.85-26,161.49-13,139.45

Finding the Fourth Proportional to 18,949.85, 26,161.49 and 13,139.45

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Solution

The fourth proportional to 18,949.85, 26,161.49 and 13,139.45 is: 18,139.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,949.85 : 26,161.49 = 13,139.45 : x
  2. Step 2: Convert to fraction form
    18,949.85/26,161.49 = 13,139.45/x
  3. Step 3: Cross multiply
    18,949.85x = 26,161.49 × 13,139.45
  4. Step 4: Simplify right side
    18,949.85x = 343,747,589.78
  5. Step 5: Solve for x
    x = 343,747,589.78/18,949.85
  6. Step 6: Final answer
    x = 18,139.86

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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.