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Finding the Fourth Proportional to 22,291.20, 33,235.20 and 21,139.20

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Solution

The fourth proportional to 22,291.20, 33,235.20 and 21,139.20 is: 31,517.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,291.20 : 33,235.20 = 21,139.20 : x
  2. Step 2: Convert to fraction form
    22,291.20/33,235.20 = 21,139.20/x
  3. Step 3: Cross multiply
    22,291.20x = 33,235.20 × 21,139.20
  4. Step 4: Simplify right side
    22,291.20x = 702,565,539.84
  5. Step 5: Solve for x
    x = 702,565,539.84/22,291.20
  6. Step 6: Final answer
    x = 31,517.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.