Home / 28,394.88-39,189.60-15,823.68

Finding the Fourth Proportional to 28,394.88, 39,189.60 and 15,823.68

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Solution

The fourth proportional to 28,394.88, 39,189.60 and 15,823.68 is: 21,839.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,394.88 : 39,189.60 = 15,823.68 : x
  2. Step 2: Convert to fraction form
    28,394.88/39,189.60 = 15,823.68/x
  3. Step 3: Cross multiply
    28,394.88x = 39,189.60 × 15,823.68
  4. Step 4: Simplify right side
    28,394.88x = 620,123,689.73
  5. Step 5: Solve for x
    x = 620,123,689.73/28,394.88
  6. Step 6: Final answer
    x = 21,839.28

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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.