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Finding the Fourth Proportional to 22,131.20, 33,148.20 and 19,215.20

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Solution

The fourth proportional to 22,131.20, 33,148.20 and 19,215.20 is: 28,780.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,131.20 : 33,148.20 = 19,215.20 : x
  2. Step 2: Convert to fraction form
    22,131.20/33,148.20 = 19,215.20/x
  3. Step 3: Cross multiply
    22,131.20x = 33,148.20 × 19,215.20
  4. Step 4: Simplify right side
    22,131.20x = 636,949,292.64
  5. Step 5: Solve for x
    x = 636,949,292.64/22,131.20
  6. Step 6: Final answer
    x = 28,780.60

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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.