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Finding the Fourth Proportional to 20,168.70, 30,230.63 and 15,222.30

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Solution

The fourth proportional to 20,168.70, 30,230.63 and 15,222.30 is: 22,816.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,168.70 : 30,230.63 = 15,222.30 : x
  2. Step 2: Convert to fraction form
    20,168.70/30,230.63 = 15,222.30/x
  3. Step 3: Cross multiply
    20,168.70x = 30,230.63 × 15,222.30
  4. Step 4: Simplify right side
    20,168.70x = 460,179,719.05
  5. Step 5: Solve for x
    x = 460,179,719.05/20,168.70
  6. Step 6: Final answer
    x = 22,816.53

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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.