Home / 15,481.80-21,362.94-12,818.52

Finding the Fourth Proportional to 15,481.80, 21,362.94 and 12,818.52

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Solution

The fourth proportional to 15,481.80, 21,362.94 and 12,818.52 is: 17,687.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,481.80 : 21,362.94 = 12,818.52 : x
  2. Step 2: Convert to fraction form
    15,481.80/21,362.94 = 12,818.52/x
  3. Step 3: Cross multiply
    15,481.80x = 21,362.94 × 12,818.52
  4. Step 4: Simplify right side
    15,481.80x = 273,841,273.65
  5. Step 5: Solve for x
    x = 273,841,273.65/15,481.80
  6. Step 6: Final answer
    x = 17,687.95

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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.