Home / 15,791.80-21,777.56-12,201.04

Finding the Fourth Proportional to 15,791.80, 21,777.56 and 12,201.04

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Solution

The fourth proportional to 15,791.80, 21,777.56 and 12,201.04 is: 16,825.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,791.80 : 21,777.56 = 12,201.04 : x
  2. Step 2: Convert to fraction form
    15,791.80/21,777.56 = 12,201.04/x
  3. Step 3: Cross multiply
    15,791.80x = 21,777.56 × 12,201.04
  4. Step 4: Simplify right side
    15,791.80x = 265,708,880.66
  5. Step 5: Solve for x
    x = 265,708,880.66/15,791.80
  6. Step 6: Final answer
    x = 16,825.75

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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.