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Finding the Fourth Proportional to 6,781.60, 10,172.24 and 3,492.80

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Solution

The fourth proportional to 6,781.60, 10,172.24 and 3,492.80 is: 5,239.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,781.60 : 10,172.24 = 3,492.80 : x
  2. Step 2: Convert to fraction form
    6,781.60/10,172.24 = 3,492.80/x
  3. Step 3: Cross multiply
    6,781.60x = 10,172.24 × 3,492.80
  4. Step 4: Simplify right side
    6,781.60x = 35,529,599.87
  5. Step 5: Solve for x
    x = 35,529,599.87/6,781.60
  6. Step 6: Final answer
    x = 5,239.12

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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.