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Finding the Fourth Proportional to 12,361.90, 18,534.66 and 6,817.90

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Solution

The fourth proportional to 12,361.90, 18,534.66 and 6,817.90 is: 10,222.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,361.90 : 18,534.66 = 6,817.90 : x
  2. Step 2: Convert to fraction form
    12,361.90/18,534.66 = 6,817.90/x
  3. Step 3: Cross multiply
    12,361.90x = 18,534.66 × 6,817.90
  4. Step 4: Simplify right side
    12,361.90x = 126,367,458.41
  5. Step 5: Solve for x
    x = 126,367,458.41/12,361.90
  6. Step 6: Final answer
    x = 10,222.33

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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.