Home / 21,121.14-31,690.47-9,268.74

Finding the Fourth Proportional to 21,121.14, 31,690.47 and 9,268.74

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Solution

The fourth proportional to 21,121.14, 31,690.47 and 9,268.74 is: 13,906.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,121.14 : 31,690.47 = 9,268.74 : x
  2. Step 2: Convert to fraction form
    21,121.14/31,690.47 = 9,268.74/x
  3. Step 3: Cross multiply
    21,121.14x = 31,690.47 × 9,268.74
  4. Step 4: Simplify right side
    21,121.14x = 293,730,568.46
  5. Step 5: Solve for x
    x = 293,730,568.46/21,121.14
  6. Step 6: Final answer
    x = 13,906.95

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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.