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Finding the Fourth Proportional to 7,138.60, 10,707.22 and 3,136.39

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Solution

The fourth proportional to 7,138.60, 10,707.22 and 3,136.39 is: 4,704.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,138.60 : 10,707.22 = 3,136.39 : x
  2. Step 2: Convert to fraction form
    7,138.60/10,707.22 = 3,136.39/x
  3. Step 3: Cross multiply
    7,138.60x = 10,707.22 × 3,136.39
  4. Step 4: Simplify right side
    7,138.60x = 33,582,017.74
  5. Step 5: Solve for x
    x = 33,582,017.74/7,138.60
  6. Step 6: Final answer
    x = 4,704.29

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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.