Home / 21,218.22-31,816.40-8,735.92

Finding the Fourth Proportional to 21,218.22, 31,816.40 and 8,735.92

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Solution

The fourth proportional to 21,218.22, 31,816.40 and 8,735.92 is: 13,099.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,218.22 : 31,816.40 = 8,735.92 : x
  2. Step 2: Convert to fraction form
    21,218.22/31,816.40 = 8,735.92/x
  3. Step 3: Cross multiply
    21,218.22x = 31,816.40 × 8,735.92
  4. Step 4: Simplify right side
    21,218.22x = 277,945,553.94
  5. Step 5: Solve for x
    x = 277,945,553.94/21,218.22
  6. Step 6: Final answer
    x = 13,099.38

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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.