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Finding the Fourth Proportional to 13,408.83, 18,503.94 and 7,440.39

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Solution

The fourth proportional to 13,408.83, 18,503.94 and 7,440.39 is: 10,267.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,408.83 : 18,503.94 = 7,440.39 : x
  2. Step 2: Convert to fraction form
    13,408.83/18,503.94 = 7,440.39/x
  3. Step 3: Cross multiply
    13,408.83x = 18,503.94 × 7,440.39
  4. Step 4: Simplify right side
    13,408.83x = 137,676,530.14
  5. Step 5: Solve for x
    x = 137,676,530.14/13,408.83
  6. Step 6: Final answer
    x = 10,267.60

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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.