Home / 13,905.45-20,859.99-7,331.88

Finding the Fourth Proportional to 13,905.45, 20,859.99 and 7,331.88

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Solution

The fourth proportional to 13,905.45, 20,859.99 and 7,331.88 is: 10,998.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,905.45 : 20,859.99 = 7,331.88 : x
  2. Step 2: Convert to fraction form
    13,905.45/20,859.99 = 7,331.88/x
  3. Step 3: Cross multiply
    13,905.45x = 20,859.99 × 7,331.88
  4. Step 4: Simplify right side
    13,905.45x = 152,942,943.48
  5. Step 5: Solve for x
    x = 152,942,943.48/13,905.45
  6. Step 6: Final answer
    x = 10,998.78

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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.