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Finding the Fourth Proportional to 17,785.99, 26,659.68 and 7,911.69

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Solution

The fourth proportional to 17,785.99, 26,659.68 and 7,911.69 is: 11,858.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,785.99 : 26,659.68 = 7,911.69 : x
  2. Step 2: Convert to fraction form
    17,785.99/26,659.68 = 7,911.69/x
  3. Step 3: Cross multiply
    17,785.99x = 26,659.68 × 7,911.69
  4. Step 4: Simplify right side
    17,785.99x = 210,923,123.66
  5. Step 5: Solve for x
    x = 210,923,123.66/17,785.99
  6. Step 6: Final answer
    x = 11,858.95

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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.