Home / 28,208.25-38,930.22-15,635.43

Finding the Fourth Proportional to 28,208.25, 38,930.22 and 15,635.43

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Solution

The fourth proportional to 28,208.25, 38,930.22 and 15,635.43 is: 21,578.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,208.25 : 38,930.22 = 15,635.43 : x
  2. Step 2: Convert to fraction form
    28,208.25/38,930.22 = 15,635.43/x
  3. Step 3: Cross multiply
    28,208.25x = 38,930.22 × 15,635.43
  4. Step 4: Simplify right side
    28,208.25x = 608,690,729.69
  5. Step 5: Solve for x
    x = 608,690,729.69/28,208.25
  6. Step 6: Final answer
    x = 21,578.46

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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.