Home / 12,655.82-18,983.19-3,890.36

Finding the Fourth Proportional to 12,655.82, 18,983.19 and 3,890.36

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Solution

The fourth proportional to 12,655.82, 18,983.19 and 3,890.36 is: 5,835.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,655.82 : 18,983.19 = 3,890.36 : x
  2. Step 2: Convert to fraction form
    12,655.82/18,983.19 = 3,890.36/x
  3. Step 3: Cross multiply
    12,655.82x = 18,983.19 × 3,890.36
  4. Step 4: Simplify right side
    12,655.82x = 73,851,443.05
  5. Step 5: Solve for x
    x = 73,851,443.05/12,655.82
  6. Step 6: Final answer
    x = 5,835.37

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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.