Home / 21,239.01-31,858.52-6,447.87

Finding the Fourth Proportional to 21,239.01, 31,858.52 and 6,447.87

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Solution

The fourth proportional to 21,239.01, 31,858.52 and 6,447.87 is: 9,671.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,239.01 : 31,858.52 = 6,447.87 : x
  2. Step 2: Convert to fraction form
    21,239.01/31,858.52 = 6,447.87/x
  3. Step 3: Cross multiply
    21,239.01x = 31,858.52 × 6,447.87
  4. Step 4: Simplify right side
    21,239.01x = 205,419,563.11
  5. Step 5: Solve for x
    x = 205,419,563.11/21,239.01
  6. Step 6: Final answer
    x = 9,671.81

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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.