Home / 11,181.60-16,772.40-3,390.80

Finding the Fourth Proportional to 11,181.60, 16,772.40 and 3,390.80

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Solution

The fourth proportional to 11,181.60, 16,772.40 and 3,390.80 is: 5,086.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,181.60 : 16,772.40 = 3,390.80 : x
  2. Step 2: Convert to fraction form
    11,181.60/16,772.40 = 3,390.80/x
  3. Step 3: Cross multiply
    11,181.60x = 16,772.40 × 3,390.80
  4. Step 4: Simplify right side
    11,181.60x = 56,871,853.92
  5. Step 5: Solve for x
    x = 56,871,853.92/11,181.60
  6. Step 6: Final answer
    x = 5,086.20

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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.