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Finding the Fourth Proportional to 22,015.20, 32,965.20 and 20,978.40

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Solution

The fourth proportional to 22,015.20, 32,965.20 and 20,978.40 is: 31,412.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,015.20 : 32,965.20 = 20,978.40 : x
  2. Step 2: Convert to fraction form
    22,015.20/32,965.20 = 20,978.40/x
  3. Step 3: Cross multiply
    22,015.20x = 32,965.20 × 20,978.40
  4. Step 4: Simplify right side
    22,015.20x = 691,557,151.68
  5. Step 5: Solve for x
    x = 691,557,151.68/22,015.20
  6. Step 6: Final answer
    x = 31,412.71

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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.