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Finding the Fourth Proportional to 20,652.62, 30,978.25 and 6,612.48

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Solution

The fourth proportional to 20,652.62, 30,978.25 and 6,612.48 is: 9,918.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,652.62 : 30,978.25 = 6,612.48 : x
  2. Step 2: Convert to fraction form
    20,652.62/30,978.25 = 6,612.48/x
  3. Step 3: Cross multiply
    20,652.62x = 30,978.25 × 6,612.48
  4. Step 4: Simplify right side
    20,652.62x = 204,843,042.03
  5. Step 5: Solve for x
    x = 204,843,042.03/20,652.62
  6. Step 6: Final answer
    x = 9,918.50

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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.