Home / 20,805.14-31,204.63-7,654.43

Finding the Fourth Proportional to 20,805.14, 31,204.63 and 7,654.43

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Solution

The fourth proportional to 20,805.14, 31,204.63 and 7,654.43 is: 11,480.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,805.14 : 31,204.63 = 7,654.43 : x
  2. Step 2: Convert to fraction form
    20,805.14/31,204.63 = 7,654.43/x
  3. Step 3: Cross multiply
    20,805.14x = 31,204.63 × 7,654.43
  4. Step 4: Simplify right side
    20,805.14x = 238,853,617.74
  5. Step 5: Solve for x
    x = 238,853,617.74/20,805.14
  6. Step 6: Final answer
    x = 11,480.51

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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.