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Finding the Fourth Proportional to 8,309.35, 12,376.50 and 8,136.32

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Solution

The fourth proportional to 8,309.35, 12,376.50 and 8,136.32 is: 12,118.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,309.35 : 12,376.50 = 8,136.32 : x
  2. Step 2: Convert to fraction form
    8,309.35/12,376.50 = 8,136.32/x
  3. Step 3: Cross multiply
    8,309.35x = 12,376.50 × 8,136.32
  4. Step 4: Simplify right side
    8,309.35x = 100,699,102.60
  5. Step 5: Solve for x
    x = 100,699,102.60/8,309.35
  6. Step 6: Final answer
    x = 12,118.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.