Home / 18,619.78-25,721.42-16,938.22

Finding the Fourth Proportional to 18,619.78, 25,721.42 and 16,938.22

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Solution

The fourth proportional to 18,619.78, 25,721.42 and 16,938.22 is: 23,398.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,619.78 : 25,721.42 = 16,938.22 : x
  2. Step 2: Convert to fraction form
    18,619.78/25,721.42 = 16,938.22/x
  3. Step 3: Cross multiply
    18,619.78x = 25,721.42 × 16,938.22
  4. Step 4: Simplify right side
    18,619.78x = 435,675,070.67
  5. Step 5: Solve for x
    x = 435,675,070.67/18,619.78
  6. Step 6: Final answer
    x = 23,398.51

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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.