Home / 20,805.22-31,193.24-7,655.88

Finding the Fourth Proportional to 20,805.22, 31,193.24 and 7,655.88

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Solution

The fourth proportional to 20,805.22, 31,193.24 and 7,655.88 is: 11,478.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,805.22 : 31,193.24 = 7,655.88 : x
  2. Step 2: Convert to fraction form
    20,805.22/31,193.24 = 7,655.88/x
  3. Step 3: Cross multiply
    20,805.22x = 31,193.24 × 7,655.88
  4. Step 4: Simplify right side
    20,805.22x = 238,811,702.25
  5. Step 5: Solve for x
    x = 238,811,702.25/20,805.22
  6. Step 6: Final answer
    x = 11,478.45

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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.