Home / 28,638.54-39,520.83-15,891.72

Finding the Fourth Proportional to 28,638.54, 39,520.83 and 15,891.72

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Solution

The fourth proportional to 28,638.54, 39,520.83 and 15,891.72 is: 21,930.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,638.54 : 39,520.83 = 15,891.72 : x
  2. Step 2: Convert to fraction form
    28,638.54/39,520.83 = 15,891.72/x
  3. Step 3: Cross multiply
    28,638.54x = 39,520.83 × 15,891.72
  4. Step 4: Simplify right side
    28,638.54x = 628,053,964.53
  5. Step 5: Solve for x
    x = 628,053,964.53/28,638.54
  6. Step 6: Final answer
    x = 21,930.38

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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.