Home / 21,661.31-32,487.30-12,649.41

Finding the Fourth Proportional to 21,661.31, 32,487.30 and 12,649.41

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Solution

The fourth proportional to 21,661.31, 32,487.30 and 12,649.41 is: 18,971.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,661.31 : 32,487.30 = 12,649.41 : x
  2. Step 2: Convert to fraction form
    21,661.31/32,487.30 = 12,649.41/x
  3. Step 3: Cross multiply
    21,661.31x = 32,487.30 × 12,649.41
  4. Step 4: Simplify right side
    21,661.31x = 410,945,177.49
  5. Step 5: Solve for x
    x = 410,945,177.49/21,661.31
  6. Step 6: Final answer
    x = 18,971.39

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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.