Home / 20,921.00-31,381.49-6,129.91

Finding the Fourth Proportional to 20,921.00, 31,381.49 and 6,129.91

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Solution

The fourth proportional to 20,921.00, 31,381.49 and 6,129.91 is: 9,194.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,921.00 : 31,381.49 = 6,129.91 : x
  2. Step 2: Convert to fraction form
    20,921.00/31,381.49 = 6,129.91/x
  3. Step 3: Cross multiply
    20,921.00x = 31,381.49 × 6,129.91
  4. Step 4: Simplify right side
    20,921.00x = 192,365,521.81
  5. Step 5: Solve for x
    x = 192,365,521.81/20,921.00
  6. Step 6: Final answer
    x = 9,194.86

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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.