Home / 28,209.20-38,928.62-15,633.95

Finding the Fourth Proportional to 28,209.20, 38,928.62 and 15,633.95

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Solution

The fourth proportional to 28,209.20, 38,928.62 and 15,633.95 is: 21,574.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,209.20 : 38,928.62 = 15,633.95 : x
  2. Step 2: Convert to fraction form
    28,209.20/38,928.62 = 15,633.95/x
  3. Step 3: Cross multiply
    28,209.20x = 38,928.62 × 15,633.95
  4. Step 4: Simplify right side
    28,209.20x = 608,608,020.48
  5. Step 5: Solve for x
    x = 608,608,020.48/28,209.20
  6. Step 6: Final answer
    x = 21,574.81

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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.