Home / 20,716.75-28,589.12-11,285.31

Finding the Fourth Proportional to 20,716.75, 28,589.12 and 11,285.31

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Solution

The fourth proportional to 20,716.75, 28,589.12 and 11,285.31 is: 15,573.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,716.75 : 28,589.12 = 11,285.31 : x
  2. Step 2: Convert to fraction form
    20,716.75/28,589.12 = 11,285.31/x
  3. Step 3: Cross multiply
    20,716.75x = 28,589.12 × 11,285.31
  4. Step 4: Simplify right side
    20,716.75x = 322,637,081.83
  5. Step 5: Solve for x
    x = 322,637,081.83/20,716.75
  6. Step 6: Final answer
    x = 15,573.73

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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.