Home / 28,589.82-39,432.87-19,638.78

Finding the Fourth Proportional to 28,589.82, 39,432.87 and 19,638.78

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Solution

The fourth proportional to 28,589.82, 39,432.87 and 19,638.78 is: 27,087.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,589.82 : 39,432.87 = 19,638.78 : x
  2. Step 2: Convert to fraction form
    28,589.82/39,432.87 = 19,638.78/x
  3. Step 3: Cross multiply
    28,589.82x = 39,432.87 × 19,638.78
  4. Step 4: Simplify right side
    28,589.82x = 774,413,458.70
  5. Step 5: Solve for x
    x = 774,413,458.70/28,589.82
  6. Step 6: Final answer
    x = 27,087.04

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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.