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Finding the Fourth Proportional to 7,136.70, 10,705.47 and 2,754.18

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Solution

The fourth proportional to 7,136.70, 10,705.47 and 2,754.18 is: 4,131.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,136.70 : 10,705.47 = 2,754.18 : x
  2. Step 2: Convert to fraction form
    7,136.70/10,705.47 = 2,754.18/x
  3. Step 3: Cross multiply
    7,136.70x = 10,705.47 × 2,754.18
  4. Step 4: Simplify right side
    7,136.70x = 29,484,791.36
  5. Step 5: Solve for x
    x = 29,484,791.36/7,136.70
  6. Step 6: Final answer
    x = 4,131.43

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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.