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Finding the Fourth Proportional to 8,160.70, 12,242.62 and 3,480.62

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Solution

The fourth proportional to 8,160.70, 12,242.62 and 3,480.62 is: 5,221.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,160.70 : 12,242.62 = 3,480.62 : x
  2. Step 2: Convert to fraction form
    8,160.70/12,242.62 = 3,480.62/x
  3. Step 3: Cross multiply
    8,160.70x = 12,242.62 × 3,480.62
  4. Step 4: Simplify right side
    8,160.70x = 42,611,908.02
  5. Step 5: Solve for x
    x = 42,611,908.02/8,160.70
  6. Step 6: Final answer
    x = 5,221.60

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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.