Home / 20,220.10-27,997.05-18,664.90

Finding the Fourth Proportional to 20,220.10, 27,997.05 and 18,664.90

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Solution

The fourth proportional to 20,220.10, 27,997.05 and 18,664.90 is: 25,843.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,220.10 : 27,997.05 = 18,664.90 : x
  2. Step 2: Convert to fraction form
    20,220.10/27,997.05 = 18,664.90/x
  3. Step 3: Cross multiply
    20,220.10x = 27,997.05 × 18,664.90
  4. Step 4: Simplify right side
    20,220.10x = 522,562,138.55
  5. Step 5: Solve for x
    x = 522,562,138.55/20,220.10
  6. Step 6: Final answer
    x = 25,843.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.