Home / 20,777.25-28,674.68-12,393.75

Finding the Fourth Proportional to 20,777.25, 28,674.68 and 12,393.75

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Solution

The fourth proportional to 20,777.25, 28,674.68 and 12,393.75 is: 17,104.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,777.25 : 28,674.68 = 12,393.75 : x
  2. Step 2: Convert to fraction form
    20,777.25/28,674.68 = 12,393.75/x
  3. Step 3: Cross multiply
    20,777.25x = 28,674.68 × 12,393.75
  4. Step 4: Simplify right side
    20,777.25x = 355,386,815.25
  5. Step 5: Solve for x
    x = 355,386,815.25/20,777.25
  6. Step 6: Final answer
    x = 17,104.61

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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.