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Finding the Fourth Proportional to 20,809.00, 28,716.42 and 11,377.56

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Solution

The fourth proportional to 20,809.00, 28,716.42 and 11,377.56 is: 15,701.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,809.00 : 28,716.42 = 11,377.56 : x
  2. Step 2: Convert to fraction form
    20,809.00/28,716.42 = 11,377.56/x
  3. Step 3: Cross multiply
    20,809.00x = 28,716.42 × 11,377.56
  4. Step 4: Simplify right side
    20,809.00x = 326,722,723.81
  5. Step 5: Solve for x
    x = 326,722,723.81/20,809.00
  6. Step 6: Final answer
    x = 15,701.03

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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.