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Finding the Fourth Proportional to 14,788.70, 20,408.67 and 8,074.39

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Solution

The fourth proportional to 14,788.70, 20,408.67 and 8,074.39 is: 11,142.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,788.70 : 20,408.67 = 8,074.39 : x
  2. Step 2: Convert to fraction form
    14,788.70/20,408.67 = 8,074.39/x
  3. Step 3: Cross multiply
    14,788.70x = 20,408.67 × 8,074.39
  4. Step 4: Simplify right side
    14,788.70x = 164,787,418.55
  5. Step 5: Solve for x
    x = 164,787,418.55/14,788.70
  6. Step 6: Final answer
    x = 11,142.79

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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.