Home / 12,123.20-16,729.08-6,816.96

Finding the Fourth Proportional to 12,123.20, 16,729.08 and 6,816.96

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Solution

The fourth proportional to 12,123.20, 16,729.08 and 6,816.96 is: 9,406.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,123.20 : 16,729.08 = 6,816.96 : x
  2. Step 2: Convert to fraction form
    12,123.20/16,729.08 = 6,816.96/x
  3. Step 3: Cross multiply
    12,123.20x = 16,729.08 × 6,816.96
  4. Step 4: Simplify right side
    12,123.20x = 114,041,469.20
  5. Step 5: Solve for x
    x = 114,041,469.20/12,123.20
  6. Step 6: Final answer
    x = 9,406.88

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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.