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Finding the Fourth Proportional to 19,993.50, 27,591.03 and 11,161.50

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Solution

The fourth proportional to 19,993.50, 27,591.03 and 11,161.50 is: 15,402.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,993.50 : 27,591.03 = 11,161.50 : x
  2. Step 2: Convert to fraction form
    19,993.50/27,591.03 = 11,161.50/x
  3. Step 3: Cross multiply
    19,993.50x = 27,591.03 × 11,161.50
  4. Step 4: Simplify right side
    19,993.50x = 307,957,281.35
  5. Step 5: Solve for x
    x = 307,957,281.35/19,993.50
  6. Step 6: Final answer
    x = 15,402.87

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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.