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Finding the Fourth Proportional to 17,919.19, 26,868.91 and 8,561.58

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Solution

The fourth proportional to 17,919.19, 26,868.91 and 8,561.58 is: 12,837.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,919.19 : 26,868.91 = 8,561.58 : x
  2. Step 2: Convert to fraction form
    17,919.19/26,868.91 = 8,561.58/x
  3. Step 3: Cross multiply
    17,919.19x = 26,868.91 × 8,561.58
  4. Step 4: Simplify right side
    17,919.19x = 230,040,322.48
  5. Step 5: Solve for x
    x = 230,040,322.48/17,919.19
  6. Step 6: Final answer
    x = 12,837.65

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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.