Home / 12,121.20-16,727.58-6,815.70

Finding the Fourth Proportional to 12,121.20, 16,727.58 and 6,815.70

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Solution

The fourth proportional to 12,121.20, 16,727.58 and 6,815.70 is: 9,405.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121.20 : 16,727.58 = 6,815.70 : x
  2. Step 2: Convert to fraction form
    12,121.20/16,727.58 = 6,815.70/x
  3. Step 3: Cross multiply
    12,121.20x = 16,727.58 × 6,815.70
  4. Step 4: Simplify right side
    12,121.20x = 114,010,167.01
  5. Step 5: Solve for x
    x = 114,010,167.01/12,121.20
  6. Step 6: Final answer
    x = 9,405.85

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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.