Home / 7,138.18-10,707.45-2,207.80

Finding the Fourth Proportional to 7,138.18, 10,707.45 and 2,207.80

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Solution

The fourth proportional to 7,138.18, 10,707.45 and 2,207.80 is: 3,311.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,138.18 : 10,707.45 = 2,207.80 : x
  2. Step 2: Convert to fraction form
    7,138.18/10,707.45 = 2,207.80/x
  3. Step 3: Cross multiply
    7,138.18x = 10,707.45 × 2,207.80
  4. Step 4: Simplify right side
    7,138.18x = 23,639,908.11
  5. Step 5: Solve for x
    x = 23,639,908.11/7,138.18
  6. Step 6: Final answer
    x = 3,311.76

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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.