Home / 21,177.43-31,768.90-6,387.84

Finding the Fourth Proportional to 21,177.43, 31,768.90 and 6,387.84

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Solution

The fourth proportional to 21,177.43, 31,768.90 and 6,387.84 is: 9,582.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,177.43 : 31,768.90 = 6,387.84 : x
  2. Step 2: Convert to fraction form
    21,177.43/31,768.90 = 6,387.84/x
  3. Step 3: Cross multiply
    21,177.43x = 31,768.90 × 6,387.84
  4. Step 4: Simplify right side
    21,177.43x = 202,934,634.21
  5. Step 5: Solve for x
    x = 202,934,634.21/21,177.43
  6. Step 6: Final answer
    x = 9,582.59

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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.