Home / 20,788.08-28,718.91-13,634.97

Finding the Fourth Proportional to 20,788.08, 28,718.91 and 13,634.97

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Solution

The fourth proportional to 20,788.08, 28,718.91 and 13,634.97 is: 18,836.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,788.08 : 28,718.91 = 13,634.97 : x
  2. Step 2: Convert to fraction form
    20,788.08/28,718.91 = 13,634.97/x
  3. Step 3: Cross multiply
    20,788.08x = 28,718.91 × 13,634.97
  4. Step 4: Simplify right side
    20,788.08x = 391,581,476.28
  5. Step 5: Solve for x
    x = 391,581,476.28/20,788.08
  6. Step 6: Final answer
    x = 18,836.83

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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.