Home / 21,163.48-31,759.98-20,999.56

Finding the Fourth Proportional to 21,163.48, 31,759.98 and 20,999.56

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Solution

The fourth proportional to 21,163.48, 31,759.98 and 20,999.56 is: 31,513.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,163.48 : 31,759.98 = 20,999.56 : x
  2. Step 2: Convert to fraction form
    21,163.48/31,759.98 = 20,999.56/x
  3. Step 3: Cross multiply
    21,163.48x = 31,759.98 × 20,999.56
  4. Step 4: Simplify right side
    21,163.48x = 666,945,605.61
  5. Step 5: Solve for x
    x = 666,945,605.61/21,163.48
  6. Step 6: Final answer
    x = 31,513.99

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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.