Home / 20,077.28-27,712.35-12,120.02

Finding the Fourth Proportional to 20,077.28, 27,712.35 and 12,120.02

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Solution

The fourth proportional to 20,077.28, 27,712.35 and 12,120.02 is: 16,729.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,077.28 : 27,712.35 = 12,120.02 : x
  2. Step 2: Convert to fraction form
    20,077.28/27,712.35 = 12,120.02/x
  3. Step 3: Cross multiply
    20,077.28x = 27,712.35 × 12,120.02
  4. Step 4: Simplify right side
    20,077.28x = 335,874,236.25
  5. Step 5: Solve for x
    x = 335,874,236.25/20,077.28
  6. Step 6: Final answer
    x = 16,729.07

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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.