Home / 7,971.48-11,956.38-2,128.60

Finding the Fourth Proportional to 7,971.48, 11,956.38 and 2,128.60

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Solution

The fourth proportional to 7,971.48, 11,956.38 and 2,128.60 is: 3,192.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,971.48 : 11,956.38 = 2,128.60 : x
  2. Step 2: Convert to fraction form
    7,971.48/11,956.38 = 2,128.60/x
  3. Step 3: Cross multiply
    7,971.48x = 11,956.38 × 2,128.60
  4. Step 4: Simplify right side
    7,971.48x = 25,450,350.47
  5. Step 5: Solve for x
    x = 25,450,350.47/7,971.48
  6. Step 6: Final answer
    x = 3,192.68

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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.