Home / 20,161.28-27,820.08-12,207.20

Finding the Fourth Proportional to 20,161.28, 27,820.08 and 12,207.20

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Solution

The fourth proportional to 20,161.28, 27,820.08 and 12,207.20 is: 16,844.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,161.28 : 27,820.08 = 12,207.20 : x
  2. Step 2: Convert to fraction form
    20,161.28/27,820.08 = 12,207.20/x
  3. Step 3: Cross multiply
    20,161.28x = 27,820.08 × 12,207.20
  4. Step 4: Simplify right side
    20,161.28x = 339,605,280.58
  5. Step 5: Solve for x
    x = 339,605,280.58/20,161.28
  6. Step 6: Final answer
    x = 16,844.43

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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.