Home / 20,077.88-27,708.20-12,118.55

Finding the Fourth Proportional to 20,077.88, 27,708.20 and 12,118.55

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Solution

The fourth proportional to 20,077.88, 27,708.20 and 12,118.55 is: 16,724.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,077.88 : 27,708.20 = 12,118.55 : x
  2. Step 2: Convert to fraction form
    20,077.88/27,708.20 = 12,118.55/x
  3. Step 3: Cross multiply
    20,077.88x = 27,708.20 × 12,118.55
  4. Step 4: Simplify right side
    20,077.88x = 335,783,146.52
  5. Step 5: Solve for x
    x = 335,783,146.52/20,077.88
  6. Step 6: Final answer
    x = 16,724.03

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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.