Home / 5,811.72-8,721.30-2,113.60

Finding the Fourth Proportional to 5,811.72, 8,721.30 and 2,113.60

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Solution

The fourth proportional to 5,811.72, 8,721.30 and 2,113.60 is: 3,171.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,811.72 : 8,721.30 = 2,113.60 : x
  2. Step 2: Convert to fraction form
    5,811.72/8,721.30 = 2,113.60/x
  3. Step 3: Cross multiply
    5,811.72x = 8,721.30 × 2,113.60
  4. Step 4: Simplify right side
    5,811.72x = 18,433,334.40
  5. Step 5: Solve for x
    x = 18,433,334.40/5,811.72
  6. Step 6: Final answer
    x = 3,171.75

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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.