Home / 18,963.75-28,422.54-13,418.69

Finding the Fourth Proportional to 18,963.75, 28,422.54 and 13,418.69

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Solution

The fourth proportional to 18,963.75, 28,422.54 and 13,418.69 is: 20,111.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,963.75 : 28,422.54 = 13,418.69 : x
  2. Step 2: Convert to fraction form
    18,963.75/28,422.54 = 13,418.69/x
  3. Step 3: Cross multiply
    18,963.75x = 28,422.54 × 13,418.69
  4. Step 4: Simplify right side
    18,963.75x = 381,393,253.27
  5. Step 5: Solve for x
    x = 381,393,253.27/18,963.75
  6. Step 6: Final answer
    x = 20,111.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.