Home / 13,711.11-18,920.30-7,741.95

Finding the Fourth Proportional to 13,711.11, 18,920.30 and 7,741.95

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Solution

The fourth proportional to 13,711.11, 18,920.30 and 7,741.95 is: 10,683.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,711.11 : 18,920.30 = 7,741.95 : x
  2. Step 2: Convert to fraction form
    13,711.11/18,920.30 = 7,741.95/x
  3. Step 3: Cross multiply
    13,711.11x = 18,920.30 × 7,741.95
  4. Step 4: Simplify right side
    13,711.11x = 146,479,977.88
  5. Step 5: Solve for x
    x = 146,479,977.88/13,711.11
  6. Step 6: Final answer
    x = 10,683.31

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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.