Home / 21,268.66-31,905.24-8,789.62

Finding the Fourth Proportional to 21,268.66, 31,905.24 and 8,789.62

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Solution

The fourth proportional to 21,268.66, 31,905.24 and 8,789.62 is: 13,185.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,268.66 : 31,905.24 = 8,789.62 : x
  2. Step 2: Convert to fraction form
    21,268.66/31,905.24 = 8,789.62/x
  3. Step 3: Cross multiply
    21,268.66x = 31,905.24 × 8,789.62
  4. Step 4: Simplify right side
    21,268.66x = 280,434,935.61
  5. Step 5: Solve for x
    x = 280,434,935.61/21,268.66
  6. Step 6: Final answer
    x = 13,185.36

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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.