Home / 8,459.21-12,691.82-3,778.79

Finding the Fourth Proportional to 8,459.21, 12,691.82 and 3,778.79

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Solution

The fourth proportional to 8,459.21, 12,691.82 and 3,778.79 is: 5,669.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,459.21 : 12,691.82 = 3,778.79 : x
  2. Step 2: Convert to fraction form
    8,459.21/12,691.82 = 3,778.79/x
  3. Step 3: Cross multiply
    8,459.21x = 12,691.82 × 3,778.79
  4. Step 4: Simplify right side
    8,459.21x = 47,959,722.50
  5. Step 5: Solve for x
    x = 47,959,722.50/8,459.21
  6. Step 6: Final answer
    x = 5,669.53

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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.