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Finding the Fourth Proportional to 12,135.86, 18,205.94 and 5,020.08

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Solution

The fourth proportional to 12,135.86, 18,205.94 and 5,020.08 is: 7,531.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,135.86 : 18,205.94 = 5,020.08 : x
  2. Step 2: Convert to fraction form
    12,135.86/18,205.94 = 5,020.08/x
  3. Step 3: Cross multiply
    12,135.86x = 18,205.94 × 5,020.08
  4. Step 4: Simplify right side
    12,135.86x = 91,395,250.17
  5. Step 5: Solve for x
    x = 91,395,250.17/12,135.86
  6. Step 6: Final answer
    x = 7,531.01

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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.