Home / 20,102.40-27,738.84-12,145.20

Finding the Fourth Proportional to 20,102.40, 27,738.84 and 12,145.20

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Solution

The fourth proportional to 20,102.40, 27,738.84 and 12,145.20 is: 16,758.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,102.40 : 27,738.84 = 12,145.20 : x
  2. Step 2: Convert to fraction form
    20,102.40/27,738.84 = 12,145.20/x
  3. Step 3: Cross multiply
    20,102.40x = 27,738.84 × 12,145.20
  4. Step 4: Simplify right side
    20,102.40x = 336,893,759.57
  5. Step 5: Solve for x
    x = 336,893,759.57/20,102.40
  6. Step 6: Final answer
    x = 16,758.88

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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.