Home / 5,136.36-7,705.85-1,438.61

Finding the Fourth Proportional to 5,136.36, 7,705.85 and 1,438.61

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Solution

The fourth proportional to 5,136.36, 7,705.85 and 1,438.61 is: 2,158.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,136.36 : 7,705.85 = 1,438.61 : x
  2. Step 2: Convert to fraction form
    5,136.36/7,705.85 = 1,438.61/x
  3. Step 3: Cross multiply
    5,136.36x = 7,705.85 × 1,438.61
  4. Step 4: Simplify right side
    5,136.36x = 11,085,667.15
  5. Step 5: Solve for x
    x = 11,085,667.15/5,136.36
  6. Step 6: Final answer
    x = 2,158.27

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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.