Home / 28,555.20-39,405.33-15,808.95

Finding the Fourth Proportional to 28,555.20, 39,405.33 and 15,808.95

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Solution

The fourth proportional to 28,555.20, 39,405.33 and 15,808.95 is: 21,815.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,555.20 : 39,405.33 = 15,808.95 : x
  2. Step 2: Convert to fraction form
    28,555.20/39,405.33 = 15,808.95/x
  3. Step 3: Cross multiply
    28,555.20x = 39,405.33 × 15,808.95
  4. Step 4: Simplify right side
    28,555.20x = 622,956,891.70
  5. Step 5: Solve for x
    x = 622,956,891.70/28,555.20
  6. Step 6: Final answer
    x = 21,815.88

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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.