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Finding the Fourth Proportional to 18,796.80, 28,195.20 and 18,140.70

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Solution

The fourth proportional to 18,796.80, 28,195.20 and 18,140.70 is: 27,211.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,796.80 : 28,195.20 = 18,140.70 : x
  2. Step 2: Convert to fraction form
    18,796.80/28,195.20 = 18,140.70/x
  3. Step 3: Cross multiply
    18,796.80x = 28,195.20 × 18,140.70
  4. Step 4: Simplify right side
    18,796.80x = 511,480,664.64
  5. Step 5: Solve for x
    x = 511,480,664.64/18,796.80
  6. Step 6: Final answer
    x = 27,211.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.