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Finding the Fourth Proportional to 18,837.70, 28,236.50 and 8,956.10

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Solution

The fourth proportional to 18,837.70, 28,236.50 and 8,956.10 is: 13,424.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,837.70 : 28,236.50 = 8,956.10 : x
  2. Step 2: Convert to fraction form
    18,837.70/28,236.50 = 8,956.10/x
  3. Step 3: Cross multiply
    18,837.70x = 28,236.50 × 8,956.10
  4. Step 4: Simplify right side
    18,837.70x = 252,888,977.05
  5. Step 5: Solve for x
    x = 252,888,977.05/18,837.70
  6. Step 6: Final answer
    x = 13,424.62

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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.