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Finding the Fourth Proportional to 45,408.71, 68,115.63 and 13,819.80

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Solution

The fourth proportional to 45,408.71, 68,115.63 and 13,819.80 is: 20,730.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,408.71 : 68,115.63 = 13,819.80 : x
  2. Step 2: Convert to fraction form
    45,408.71/68,115.63 = 13,819.80/x
  3. Step 3: Cross multiply
    45,408.71x = 68,115.63 × 13,819.80
  4. Step 4: Simplify right side
    45,408.71x = 941,344,383.47
  5. Step 5: Solve for x
    x = 941,344,383.47/45,408.71
  6. Step 6: Final answer
    x = 20,730.48

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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.