Home / 21,640.25-29,863.68-13,256.75

Finding the Fourth Proportional to 21,640.25, 29,863.68 and 13,256.75

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Solution

The fourth proportional to 21,640.25, 29,863.68 and 13,256.75 is: 18,294.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,640.25 : 29,863.68 = 13,256.75 : x
  2. Step 2: Convert to fraction form
    21,640.25/29,863.68 = 13,256.75/x
  3. Step 3: Cross multiply
    21,640.25x = 29,863.68 × 13,256.75
  4. Step 4: Simplify right side
    21,640.25x = 395,895,339.84
  5. Step 5: Solve for x
    x = 395,895,339.84/21,640.25
  6. Step 6: Final answer
    x = 18,294.40

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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.