Home / 7,139.90-10,706.20-2,758.62

Finding the Fourth Proportional to 7,139.90, 10,706.20 and 2,758.62

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Solution

The fourth proportional to 7,139.90, 10,706.20 and 2,758.62 is: 4,136.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,139.90 : 10,706.20 = 2,758.62 : x
  2. Step 2: Convert to fraction form
    7,139.90/10,706.20 = 2,758.62/x
  3. Step 3: Cross multiply
    7,139.90x = 10,706.20 × 2,758.62
  4. Step 4: Simplify right side
    7,139.90x = 29,534,337.44
  5. Step 5: Solve for x
    x = 29,534,337.44/7,139.90
  6. Step 6: Final answer
    x = 4,136.52

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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.