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Finding the Fourth Proportional to 13,544.40, 18,692.86 and 7,879.39

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Solution

The fourth proportional to 13,544.40, 18,692.86 and 7,879.39 is: 10,874.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,544.40 : 18,692.86 = 7,879.39 : x
  2. Step 2: Convert to fraction form
    13,544.40/18,692.86 = 7,879.39/x
  3. Step 3: Cross multiply
    13,544.40x = 18,692.86 × 7,879.39
  4. Step 4: Simplify right side
    13,544.40x = 147,288,294.76
  5. Step 5: Solve for x
    x = 147,288,294.76/13,544.40
  6. Step 6: Final answer
    x = 10,874.48

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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.