Home / 20,811.10-31,199.10-9,711.94

Finding the Fourth Proportional to 20,811.10, 31,199.10 and 9,711.94

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Solution

The fourth proportional to 20,811.10, 31,199.10 and 9,711.94 is: 14,559.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,811.10 : 31,199.10 = 9,711.94 : x
  2. Step 2: Convert to fraction form
    20,811.10/31,199.10 = 9,711.94/x
  3. Step 3: Cross multiply
    20,811.10x = 31,199.10 × 9,711.94
  4. Step 4: Simplify right side
    20,811.10x = 303,003,787.25
  5. Step 5: Solve for x
    x = 303,003,787.25/20,811.10
  6. Step 6: Final answer
    x = 14,559.72

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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.