Home / 12,121.85-16,727.54-6,816.35

Finding the Fourth Proportional to 12,121.85, 16,727.54 and 6,816.35

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Solution

The fourth proportional to 12,121.85, 16,727.54 and 6,816.35 is: 9,406.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121.85 : 16,727.54 = 6,816.35 : x
  2. Step 2: Convert to fraction form
    12,121.85/16,727.54 = 6,816.35/x
  3. Step 3: Cross multiply
    12,121.85x = 16,727.54 × 6,816.35
  4. Step 4: Simplify right side
    12,121.85x = 114,020,649.56
  5. Step 5: Solve for x
    x = 114,020,649.56/12,121.85
  6. Step 6: Final answer
    x = 9,406.21

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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.