Home / 20,655.90-30,995.82-8,809.04

Finding the Fourth Proportional to 20,655.90, 30,995.82 and 8,809.04

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Solution

The fourth proportional to 20,655.90, 30,995.82 and 8,809.04 is: 13,218.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,655.90 : 30,995.82 = 8,809.04 : x
  2. Step 2: Convert to fraction form
    20,655.90/30,995.82 = 8,809.04/x
  3. Step 3: Cross multiply
    20,655.90x = 30,995.82 × 8,809.04
  4. Step 4: Simplify right side
    20,655.90x = 273,043,263.23
  5. Step 5: Solve for x
    x = 273,043,263.23/20,655.90
  6. Step 6: Final answer
    x = 13,218.66

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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.