Home / 21,249.22-29,323.38-11,688.61

Finding the Fourth Proportional to 21,249.22, 29,323.38 and 11,688.61

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Solution

The fourth proportional to 21,249.22, 29,323.38 and 11,688.61 is: 16,129.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,249.22 : 29,323.38 = 11,688.61 : x
  2. Step 2: Convert to fraction form
    21,249.22/29,323.38 = 11,688.61/x
  3. Step 3: Cross multiply
    21,249.22x = 29,323.38 × 11,688.61
  4. Step 4: Simplify right side
    21,249.22x = 342,749,552.70
  5. Step 5: Solve for x
    x = 342,749,552.70/21,249.22
  6. Step 6: Final answer
    x = 16,129.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.