Home / 12,121.45-16,727.82-6,816.45

Finding the Fourth Proportional to 12,121.45, 16,727.82 and 6,816.45

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Solution

The fourth proportional to 12,121.45, 16,727.82 and 6,816.45 is: 9,406.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121.45 : 16,727.82 = 6,816.45 : x
  2. Step 2: Convert to fraction form
    12,121.45/16,727.82 = 6,816.45/x
  3. Step 3: Cross multiply
    12,121.45x = 16,727.82 × 6,816.45
  4. Step 4: Simplify right side
    12,121.45x = 114,024,385.81
  5. Step 5: Solve for x
    x = 114,024,385.81/12,121.45
  6. Step 6: Final answer
    x = 9,406.83

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Half scale
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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.