Home / 21,191.18-31,791.91-6,399.21

Finding the Fourth Proportional to 21,191.18, 31,791.91 and 6,399.21

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Solution

The fourth proportional to 21,191.18, 31,791.91 and 6,399.21 is: 9,600.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,191.18 : 31,791.91 = 6,399.21 : x
  2. Step 2: Convert to fraction form
    21,191.18/31,791.91 = 6,399.21/x
  3. Step 3: Cross multiply
    21,191.18x = 31,791.91 × 6,399.21
  4. Step 4: Simplify right side
    21,191.18x = 203,443,108.39
  5. Step 5: Solve for x
    x = 203,443,108.39/21,191.18
  6. Step 6: Final answer
    x = 9,600.37

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1.5x scale

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.