Home / 21,153.45-29,188.71-11,721.99

Finding the Fourth Proportional to 21,153.45, 29,188.71 and 11,721.99

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Solution

The fourth proportional to 21,153.45, 29,188.71 and 11,721.99 is: 16,174.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,153.45 : 29,188.71 = 11,721.99 : x
  2. Step 2: Convert to fraction form
    21,153.45/29,188.71 = 11,721.99/x
  3. Step 3: Cross multiply
    21,153.45x = 29,188.71 × 11,721.99
  4. Step 4: Simplify right side
    21,153.45x = 342,149,766.73
  5. Step 5: Solve for x
    x = 342,149,766.73/21,153.45
  6. Step 6: Final answer
    x = 16,174.66

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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.