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Finding the Fourth Proportional to 18,697.61, 25,794.78 and 11,981.09

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Solution

The fourth proportional to 18,697.61, 25,794.78 and 11,981.09 is: 16,528.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,697.61 : 25,794.78 = 11,981.09 : x
  2. Step 2: Convert to fraction form
    18,697.61/25,794.78 = 11,981.09/x
  3. Step 3: Cross multiply
    18,697.61x = 25,794.78 × 11,981.09
  4. Step 4: Simplify right side
    18,697.61x = 309,049,580.71
  5. Step 5: Solve for x
    x = 309,049,580.71/18,697.61
  6. Step 6: Final answer
    x = 16,528.83

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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.