Home / 21,223.20-29,288.16-11,791.92

Finding the Fourth Proportional to 21,223.20, 29,288.16 and 11,791.92

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Solution

The fourth proportional to 21,223.20, 29,288.16 and 11,791.92 is: 16,272.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,223.20 : 29,288.16 = 11,791.92 : x
  2. Step 2: Convert to fraction form
    21,223.20/29,288.16 = 11,791.92/x
  3. Step 3: Cross multiply
    21,223.20x = 29,288.16 × 11,791.92
  4. Step 4: Simplify right side
    21,223.20x = 345,363,639.67
  5. Step 5: Solve for x
    x = 345,363,639.67/21,223.20
  6. Step 6: Final answer
    x = 16,272.93

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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.