Home / 21,268.87-31,908.08-6,478.96

Finding the Fourth Proportional to 21,268.87, 31,908.08 and 6,478.96

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Solution

The fourth proportional to 21,268.87, 31,908.08 and 6,478.96 is: 9,719.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,268.87 : 31,908.08 = 6,478.96 : x
  2. Step 2: Convert to fraction form
    21,268.87/31,908.08 = 6,478.96/x
  3. Step 3: Cross multiply
    21,268.87x = 31,908.08 × 6,478.96
  4. Step 4: Simplify right side
    21,268.87x = 206,731,174.00
  5. Step 5: Solve for x
    x = 206,731,174.00/21,268.87
  6. Step 6: Final answer
    x = 9,719.89

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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.