Home / 20,716.40-28,589.40-11,763.68

Finding the Fourth Proportional to 20,716.40, 28,589.40 and 11,763.68

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Solution

The fourth proportional to 20,716.40, 28,589.40 and 11,763.68 is: 16,234.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,716.40 : 28,589.40 = 11,763.68 : x
  2. Step 2: Convert to fraction form
    20,716.40/28,589.40 = 11,763.68/x
  3. Step 3: Cross multiply
    20,716.40x = 28,589.40 × 11,763.68
  4. Step 4: Simplify right side
    20,716.40x = 336,316,410.05
  5. Step 5: Solve for x
    x = 336,316,410.05/20,716.40
  6. Step 6: Final answer
    x = 16,234.31

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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.