Home / 21,231-31,845.24-6,440.04

Finding the Fourth Proportional to 21,231, 31,845.24 and 6,440.04

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Solution

The fourth proportional to 21,231, 31,845.24 and 6,440.04 is: 9,659.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,231 : 31,845.24 = 6,440.04 : x
  2. Step 2: Convert to fraction form
    21,231/31,845.24 = 6,440.04/x
  3. Step 3: Cross multiply
    21,231x = 31,845.24 × 6,440.04
  4. Step 4: Simplify right side
    21,231x = 205,084,619.41
  5. Step 5: Solve for x
    x = 205,084,619.41/21,231
  6. Step 6: Final answer
    x = 9,659.68

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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.