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Finding the Fourth Proportional to 28,054.70, 41,972.70 and 18,213.20

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Solution

The fourth proportional to 28,054.70, 41,972.70 and 18,213.20 is: 27,248.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,054.70 : 41,972.70 = 18,213.20 : x
  2. Step 2: Convert to fraction form
    28,054.70/41,972.70 = 18,213.20/x
  3. Step 3: Cross multiply
    28,054.70x = 41,972.70 × 18,213.20
  4. Step 4: Simplify right side
    28,054.70x = 764,457,179.64
  5. Step 5: Solve for x
    x = 764,457,179.64/28,054.70
  6. Step 6: Final answer
    x = 27,248.81

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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.