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Finding the Fourth Proportional to 11,758.59, 17,611.97 and 7,131.87

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Solution

The fourth proportional to 11,758.59, 17,611.97 and 7,131.87 is: 10,682.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,758.59 : 17,611.97 = 7,131.87 : x
  2. Step 2: Convert to fraction form
    11,758.59/17,611.97 = 7,131.87/x
  3. Step 3: Cross multiply
    11,758.59x = 17,611.97 × 7,131.87
  4. Step 4: Simplify right side
    11,758.59x = 125,606,244.82
  5. Step 5: Solve for x
    x = 125,606,244.82/11,758.59
  6. Step 6: Final answer
    x = 10,682.08

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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.