Home / 15,610.78-21,517.59-12,201.85

Finding the Fourth Proportional to 15,610.78, 21,517.59 and 12,201.85

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Solution

The fourth proportional to 15,610.78, 21,517.59 and 12,201.85 is: 16,818.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,610.78 : 21,517.59 = 12,201.85 : x
  2. Step 2: Convert to fraction form
    15,610.78/21,517.59 = 12,201.85/x
  3. Step 3: Cross multiply
    15,610.78x = 21,517.59 × 12,201.85
  4. Step 4: Simplify right side
    15,610.78x = 262,554,405.54
  5. Step 5: Solve for x
    x = 262,554,405.54/15,610.78
  6. Step 6: Final answer
    x = 16,818.79

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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.