Home / 20,801.30-31,163.55-19,418.90

Finding the Fourth Proportional to 20,801.30, 31,163.55 and 19,418.90

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Solution

The fourth proportional to 20,801.30, 31,163.55 and 19,418.90 is: 29,092.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,801.30 : 31,163.55 = 19,418.90 : x
  2. Step 2: Convert to fraction form
    20,801.30/31,163.55 = 19,418.90/x
  3. Step 3: Cross multiply
    20,801.30x = 31,163.55 × 19,418.90
  4. Step 4: Simplify right side
    20,801.30x = 605,161,861.10
  5. Step 5: Solve for x
    x = 605,161,861.10/20,801.30
  6. Step 6: Final answer
    x = 29,092.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.