Home / 12,121.89-16,728.87-6,817.02

Finding the Fourth Proportional to 12,121.89, 16,728.87 and 6,817.02

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Solution

The fourth proportional to 12,121.89, 16,728.87 and 6,817.02 is: 9,407.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121.89 : 16,728.87 = 6,817.02 : x
  2. Step 2: Convert to fraction form
    12,121.89/16,728.87 = 6,817.02/x
  3. Step 3: Cross multiply
    12,121.89x = 16,728.87 × 6,817.02
  4. Step 4: Simplify right side
    12,121.89x = 114,041,041.37
  5. Step 5: Solve for x
    x = 114,041,041.37/12,121.89
  6. Step 6: Final answer
    x = 9,407.86

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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.