Home / 21,116.97-28,986.17-18,673.39

Finding the Fourth Proportional to 21,116.97, 28,986.17 and 18,673.39

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Solution

The fourth proportional to 21,116.97, 28,986.17 and 18,673.39 is: 25,631.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,116.97 : 28,986.17 = 18,673.39 : x
  2. Step 2: Convert to fraction form
    21,116.97/28,986.17 = 18,673.39/x
  3. Step 3: Cross multiply
    21,116.97x = 28,986.17 × 18,673.39
  4. Step 4: Simplify right side
    21,116.97x = 541,270,057.02
  5. Step 5: Solve for x
    x = 541,270,057.02/21,116.97
  6. Step 6: Final answer
    x = 25,631.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.