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Finding the Fourth Proportional to 22,138.80, 33,208.20 and 6,556.40

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Solution

The fourth proportional to 22,138.80, 33,208.20 and 6,556.40 is: 9,834.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,138.80 : 33,208.20 = 6,556.40 : x
  2. Step 2: Convert to fraction form
    22,138.80/33,208.20 = 6,556.40/x
  3. Step 3: Cross multiply
    22,138.80x = 33,208.20 × 6,556.40
  4. Step 4: Simplify right side
    22,138.80x = 217,726,242.48
  5. Step 5: Solve for x
    x = 217,726,242.48/22,138.80
  6. Step 6: Final answer
    x = 9,834.60

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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.