Home / 21,268.16-31,904.49-8,789.12

Finding the Fourth Proportional to 21,268.16, 31,904.49 and 8,789.12

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Solution

The fourth proportional to 21,268.16, 31,904.49 and 8,789.12 is: 13,184.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,268.16 : 31,904.49 = 8,789.12 : x
  2. Step 2: Convert to fraction form
    21,268.16/31,904.49 = 8,789.12/x
  3. Step 3: Cross multiply
    21,268.16x = 31,904.49 × 8,789.12
  4. Step 4: Simplify right side
    21,268.16x = 280,412,391.15
  5. Step 5: Solve for x
    x = 280,412,391.15/21,268.16
  6. Step 6: Final answer
    x = 13,184.61

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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.