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Finding the Fourth Proportional to 22,280.80, 33,421.20 and 20,822.80

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Solution

The fourth proportional to 22,280.80, 33,421.20 and 20,822.80 is: 31,234.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,280.80 : 33,421.20 = 20,822.80 : x
  2. Step 2: Convert to fraction form
    22,280.80/33,421.20 = 20,822.80/x
  3. Step 3: Cross multiply
    22,280.80x = 33,421.20 × 20,822.80
  4. Step 4: Simplify right side
    22,280.80x = 695,922,963.36
  5. Step 5: Solve for x
    x = 695,922,963.36/22,280.80
  6. Step 6: Final answer
    x = 31,234.20

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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.