Home / 11,280.72-16,921.20-3,072.72

Finding the Fourth Proportional to 11,280.72, 16,921.20 and 3,072.72

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Solution

The fourth proportional to 11,280.72, 16,921.20 and 3,072.72 is: 4,609.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,280.72 : 16,921.20 = 3,072.72 : x
  2. Step 2: Convert to fraction form
    11,280.72/16,921.20 = 3,072.72/x
  3. Step 3: Cross multiply
    11,280.72x = 16,921.20 × 3,072.72
  4. Step 4: Simplify right side
    11,280.72x = 51,994,109.66
  5. Step 5: Solve for x
    x = 51,994,109.66/11,280.72
  6. Step 6: Final answer
    x = 4,609.11

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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.