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Finding the Fourth Proportional to 13,378.82, 20,062.41 and 7,137.44

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Solution

The fourth proportional to 13,378.82, 20,062.41 and 7,137.44 is: 10,703.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,378.82 : 20,062.41 = 7,137.44 : x
  2. Step 2: Convert to fraction form
    13,378.82/20,062.41 = 7,137.44/x
  3. Step 3: Cross multiply
    13,378.82x = 20,062.41 × 7,137.44
  4. Step 4: Simplify right side
    13,378.82x = 143,194,197.47
  5. Step 5: Solve for x
    x = 143,194,197.47/13,378.82
  6. Step 6: Final answer
    x = 10,703.05

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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.