Home / 21,040.62-31,539.60-13,649.79

Finding the Fourth Proportional to 21,040.62, 31,539.60 and 13,649.79

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Solution

The fourth proportional to 21,040.62, 31,539.60 and 13,649.79 is: 20,460.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,040.62 : 31,539.60 = 13,649.79 : x
  2. Step 2: Convert to fraction form
    21,040.62/31,539.60 = 13,649.79/x
  3. Step 3: Cross multiply
    21,040.62x = 31,539.60 × 13,649.79
  4. Step 4: Simplify right side
    21,040.62x = 430,508,916.68
  5. Step 5: Solve for x
    x = 430,508,916.68/21,040.62
  6. Step 6: Final answer
    x = 20,460.85

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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.