Home / 21,181.11-31,772.49-6,390.03

Finding the Fourth Proportional to 21,181.11, 31,772.49 and 6,390.03

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Solution

The fourth proportional to 21,181.11, 31,772.49 and 6,390.03 is: 9,585.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,181.11 : 31,772.49 = 6,390.03 : x
  2. Step 2: Convert to fraction form
    21,181.11/31,772.49 = 6,390.03/x
  3. Step 3: Cross multiply
    21,181.11x = 31,772.49 × 6,390.03
  4. Step 4: Simplify right side
    21,181.11x = 203,027,063.02
  5. Step 5: Solve for x
    x = 203,027,063.02/21,181.11
  6. Step 6: Final answer
    x = 9,585.29

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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.