Home / 21,718.38-29,971.16-12,286.94

Finding the Fourth Proportional to 21,718.38, 29,971.16 and 12,286.94

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Solution

The fourth proportional to 21,718.38, 29,971.16 and 12,286.94 is: 16,955.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,718.38 : 29,971.16 = 12,286.94 : x
  2. Step 2: Convert to fraction form
    21,718.38/29,971.16 = 12,286.94/x
  3. Step 3: Cross multiply
    21,718.38x = 29,971.16 × 12,286.94
  4. Step 4: Simplify right side
    21,718.38x = 368,253,708.29
  5. Step 5: Solve for x
    x = 368,253,708.29/21,718.38
  6. Step 6: Final answer
    x = 16,955.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.