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Finding the Fourth Proportional to 8,419.70, 12,611.18 and 6,942.26

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Solution

The fourth proportional to 8,419.70, 12,611.18 and 6,942.26 is: 10,398.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,419.70 : 12,611.18 = 6,942.26 : x
  2. Step 2: Convert to fraction form
    8,419.70/12,611.18 = 6,942.26/x
  3. Step 3: Cross multiply
    8,419.70x = 12,611.18 × 6,942.26
  4. Step 4: Simplify right side
    8,419.70x = 87,550,090.47
  5. Step 5: Solve for x
    x = 87,550,090.47/8,419.70
  6. Step 6: Final answer
    x = 10,398.24

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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.