Home / 28,172.97-38,877.49-15,425.92

Finding the Fourth Proportional to 28,172.97, 38,877.49 and 15,425.92

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Solution

The fourth proportional to 28,172.97, 38,877.49 and 15,425.92 is: 21,287.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,172.97 : 38,877.49 = 15,425.92 : x
  2. Step 2: Convert to fraction form
    28,172.97/38,877.49 = 15,425.92/x
  3. Step 3: Cross multiply
    28,172.97x = 38,877.49 × 15,425.92
  4. Step 4: Simplify right side
    28,172.97x = 599,720,914.78
  5. Step 5: Solve for x
    x = 599,720,914.78/28,172.97
  6. Step 6: Final answer
    x = 21,287.10

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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.