Home / 21,691.26-29,934.32-12,259.80

Finding the Fourth Proportional to 21,691.26, 29,934.32 and 12,259.80

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Solution

The fourth proportional to 21,691.26, 29,934.32 and 12,259.80 is: 16,918.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,691.26 : 29,934.32 = 12,259.80 : x
  2. Step 2: Convert to fraction form
    21,691.26/29,934.32 = 12,259.80/x
  3. Step 3: Cross multiply
    21,691.26x = 29,934.32 × 12,259.80
  4. Step 4: Simplify right side
    21,691.26x = 366,988,715.04
  5. Step 5: Solve for x
    x = 366,988,715.04/21,691.26
  6. Step 6: Final answer
    x = 16,918.74

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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.