Home / 28,204.20-38,921.72-15,628.95

Finding the Fourth Proportional to 28,204.20, 38,921.72 and 15,628.95

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Solution

The fourth proportional to 28,204.20, 38,921.72 and 15,628.95 is: 21,567.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,204.20 : 38,921.72 = 15,628.95 : x
  2. Step 2: Convert to fraction form
    28,204.20/38,921.72 = 15,628.95/x
  3. Step 3: Cross multiply
    28,204.20x = 38,921.72 × 15,628.95
  4. Step 4: Simplify right side
    28,204.20x = 608,305,537.65
  5. Step 5: Solve for x
    x = 608,305,537.65/28,204.20
  6. Step 6: Final answer
    x = 21,567.91

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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.