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Finding the Fourth Proportional to 18,937.60, 28,446.90 and 11,546.08

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Solution

The fourth proportional to 18,937.60, 28,446.90 and 11,546.08 is: 17,343.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,937.60 : 28,446.90 = 11,546.08 : x
  2. Step 2: Convert to fraction form
    18,937.60/28,446.90 = 11,546.08/x
  3. Step 3: Cross multiply
    18,937.60x = 28,446.90 × 11,546.08
  4. Step 4: Simplify right side
    18,937.60x = 328,450,183.15
  5. Step 5: Solve for x
    x = 328,450,183.15/18,937.60
  6. Step 6: Final answer
    x = 17,343.81

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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.