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Finding the Fourth Proportional to 20,144.90, 30,180.90 and 17,228.90

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Solution

The fourth proportional to 20,144.90, 30,180.90 and 17,228.90 is: 25,812.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,144.90 : 30,180.90 = 17,228.90 : x
  2. Step 2: Convert to fraction form
    20,144.90/30,180.90 = 17,228.90/x
  3. Step 3: Cross multiply
    20,144.90x = 30,180.90 × 17,228.90
  4. Step 4: Simplify right side
    20,144.90x = 519,983,708.01
  5. Step 5: Solve for x
    x = 519,983,708.01/20,144.90
  6. Step 6: Final answer
    x = 25,812.18

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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.