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Finding the Fourth Proportional to 20,131.78, 30,202.88 and 7,652.02

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Solution

The fourth proportional to 20,131.78, 30,202.88 and 7,652.02 is: 11,480.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,131.78 : 30,202.88 = 7,652.02 : x
  2. Step 2: Convert to fraction form
    20,131.78/30,202.88 = 7,652.02/x
  3. Step 3: Cross multiply
    20,131.78x = 30,202.88 × 7,652.02
  4. Step 4: Simplify right side
    20,131.78x = 231,113,041.82
  5. Step 5: Solve for x
    x = 231,113,041.82/20,131.78
  6. Step 6: Final answer
    x = 11,480.01

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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.