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Finding the Fourth Proportional to 13,433.58, 20,161.14 and 7,891.59

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Solution

The fourth proportional to 13,433.58, 20,161.14 and 7,891.59 is: 11,843.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,433.58 : 20,161.14 = 7,891.59 : x
  2. Step 2: Convert to fraction form
    13,433.58/20,161.14 = 7,891.59/x
  3. Step 3: Cross multiply
    13,433.58x = 20,161.14 × 7,891.59
  4. Step 4: Simplify right side
    13,433.58x = 159,103,496.82
  5. Step 5: Solve for x
    x = 159,103,496.82/13,433.58
  6. Step 6: Final answer
    x = 11,843.72

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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.