Home / 20,949.06-28,909.38-11,389.05

Finding the Fourth Proportional to 20,949.06, 28,909.38 and 11,389.05

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Solution

The fourth proportional to 20,949.06, 28,909.38 and 11,389.05 is: 15,716.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,949.06 : 28,909.38 = 11,389.05 : x
  2. Step 2: Convert to fraction form
    20,949.06/28,909.38 = 11,389.05/x
  3. Step 3: Cross multiply
    20,949.06x = 28,909.38 × 11,389.05
  4. Step 4: Simplify right side
    20,949.06x = 329,250,374.29
  5. Step 5: Solve for x
    x = 329,250,374.29/20,949.06
  6. Step 6: Final answer
    x = 15,716.71

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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.