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Finding the Fourth Proportional to 8,330.80, 12,496.20 and 8,136.40

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Solution

The fourth proportional to 8,330.80, 12,496.20 and 8,136.40 is: 12,204.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,330.80 : 12,496.20 = 8,136.40 : x
  2. Step 2: Convert to fraction form
    8,330.80/12,496.20 = 8,136.40/x
  3. Step 3: Cross multiply
    8,330.80x = 12,496.20 × 8,136.40
  4. Step 4: Simplify right side
    8,330.80x = 101,674,081.68
  5. Step 5: Solve for x
    x = 101,674,081.68/8,330.80
  6. Step 6: Final answer
    x = 12,204.60

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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.