Home / 21,268.29-31,904.61-8,131.71

Finding the Fourth Proportional to 21,268.29, 31,904.61 and 8,131.71

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Solution

The fourth proportional to 21,268.29, 31,904.61 and 8,131.71 is: 12,198.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,268.29 : 31,904.61 = 8,131.71 : x
  2. Step 2: Convert to fraction form
    21,268.29/31,904.61 = 8,131.71/x
  3. Step 3: Cross multiply
    21,268.29x = 31,904.61 × 8,131.71
  4. Step 4: Simplify right side
    21,268.29x = 259,439,036.18
  5. Step 5: Solve for x
    x = 259,439,036.18/21,268.29
  6. Step 6: Final answer
    x = 12,198.40

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1.5x scale

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.