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Finding the Fourth Proportional to 7,363.20, 11,055.60 and 5,721.60

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Solution

The fourth proportional to 7,363.20, 11,055.60 and 5,721.60 is: 8,590.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,363.20 : 11,055.60 = 5,721.60 : x
  2. Step 2: Convert to fraction form
    7,363.20/11,055.60 = 5,721.60/x
  3. Step 3: Cross multiply
    7,363.20x = 11,055.60 × 5,721.60
  4. Step 4: Simplify right side
    7,363.20x = 63,255,720.96
  5. Step 5: Solve for x
    x = 63,255,720.96/7,363.20
  6. Step 6: Final answer
    x = 8,590.79

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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.