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Finding the Fourth Proportional to 18,704.50, 25,808.14 and 11,153.68

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Solution

The fourth proportional to 18,704.50, 25,808.14 and 11,153.68 is: 15,389.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,704.50 : 25,808.14 = 11,153.68 : x
  2. Step 2: Convert to fraction form
    18,704.50/25,808.14 = 11,153.68/x
  3. Step 3: Cross multiply
    18,704.50x = 25,808.14 × 11,153.68
  4. Step 4: Simplify right side
    18,704.50x = 287,855,734.96
  5. Step 5: Solve for x
    x = 287,855,734.96/18,704.50
  6. Step 6: Final answer
    x = 15,389.65

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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.