Home / 20,974.29-31,505.18-12,226.29

Finding the Fourth Proportional to 20,974.29, 31,505.18 and 12,226.29

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Solution

The fourth proportional to 20,974.29, 31,505.18 and 12,226.29 is: 18,364.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,974.29 : 31,505.18 = 12,226.29 : x
  2. Step 2: Convert to fraction form
    20,974.29/31,505.18 = 12,226.29/x
  3. Step 3: Cross multiply
    20,974.29x = 31,505.18 × 12,226.29
  4. Step 4: Simplify right side
    20,974.29x = 385,191,406.05
  5. Step 5: Solve for x
    x = 385,191,406.05/20,974.29
  6. Step 6: Final answer
    x = 18,364.93

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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.