Home / 21,997.80-30,356.76-11,926.20

Finding the Fourth Proportional to 21,997.80, 30,356.76 and 11,926.20

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Solution

The fourth proportional to 21,997.80, 30,356.76 and 11,926.20 is: 16,458.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,997.80 : 30,356.76 = 11,926.20 : x
  2. Step 2: Convert to fraction form
    21,997.80/30,356.76 = 11,926.20/x
  3. Step 3: Cross multiply
    21,997.80x = 30,356.76 × 11,926.20
  4. Step 4: Simplify right side
    21,997.80x = 362,040,791.11
  5. Step 5: Solve for x
    x = 362,040,791.11/21,997.80
  6. Step 6: Final answer
    x = 16,458.05

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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.