Home / 7,168.72-9,892.80-3,982

Finding the Fourth Proportional to 7,168.72, 9,892.80 and 3,982

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Solution

The fourth proportional to 7,168.72, 9,892.80 and 3,982 is: 5,495.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,168.72 : 9,892.80 = 3,982 : x
  2. Step 2: Convert to fraction form
    7,168.72/9,892.80 = 3,982/x
  3. Step 3: Cross multiply
    7,168.72x = 9,892.80 × 3,982
  4. Step 4: Simplify right side
    7,168.72x = 39,393,129.60
  5. Step 5: Solve for x
    x = 39,393,129.60/7,168.72
  6. Step 6: Final answer
    x = 5,495.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.