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Finding the Fourth Proportional to 21,243.48, 31,865.22 and 7,203.56

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Solution

The fourth proportional to 21,243.48, 31,865.22 and 7,203.56 is: 10,805.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,243.48 : 31,865.22 = 7,203.56 : x
  2. Step 2: Convert to fraction form
    21,243.48/31,865.22 = 7,203.56/x
  3. Step 3: Cross multiply
    21,243.48x = 31,865.22 × 7,203.56
  4. Step 4: Simplify right side
    21,243.48x = 229,542,864.86
  5. Step 5: Solve for x
    x = 229,542,864.86/21,243.48
  6. Step 6: Final answer
    x = 10,805.33

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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.