Home / 12,979.50-19,471.68-4,212.06

Finding the Fourth Proportional to 12,979.50, 19,471.68 and 4,212.06

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Solution

The fourth proportional to 12,979.50, 19,471.68 and 4,212.06 is: 6,318.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,979.50 : 19,471.68 = 4,212.06 : x
  2. Step 2: Convert to fraction form
    12,979.50/19,471.68 = 4,212.06/x
  3. Step 3: Cross multiply
    12,979.50x = 19,471.68 × 4,212.06
  4. Step 4: Simplify right side
    12,979.50x = 82,015,884.46
  5. Step 5: Solve for x
    x = 82,015,884.46/12,979.50
  6. Step 6: Final answer
    x = 6,318.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.