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Finding the Fourth Proportional to 20,072.40, 30,108.60 and 18,225.60

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Solution

The fourth proportional to 20,072.40, 30,108.60 and 18,225.60 is: 27,338.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,072.40 : 30,108.60 = 18,225.60 : x
  2. Step 2: Convert to fraction form
    20,072.40/30,108.60 = 18,225.60/x
  3. Step 3: Cross multiply
    20,072.40x = 30,108.60 × 18,225.60
  4. Step 4: Simplify right side
    20,072.40x = 548,747,300.16
  5. Step 5: Solve for x
    x = 548,747,300.16/20,072.40
  6. Step 6: Final answer
    x = 27,338.40

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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.