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Finding the Fourth Proportional to 9,136.35, 13,710.60 and 5,187.60

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Solution

The fourth proportional to 9,136.35, 13,710.60 and 5,187.60 is: 7,784.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,136.35 : 13,710.60 = 5,187.60 : x
  2. Step 2: Convert to fraction form
    9,136.35/13,710.60 = 5,187.60/x
  3. Step 3: Cross multiply
    9,136.35x = 13,710.60 × 5,187.60
  4. Step 4: Simplify right side
    9,136.35x = 71,125,108.56
  5. Step 5: Solve for x
    x = 71,125,108.56/9,136.35
  6. Step 6: Final answer
    x = 7,784.85

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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.