Home / 21,143.97-29,180.70-11,715.57

Finding the Fourth Proportional to 21,143.97, 29,180.70 and 11,715.57

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Solution

The fourth proportional to 21,143.97, 29,180.70 and 11,715.57 is: 16,168.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,143.97 : 29,180.70 = 11,715.57 : x
  2. Step 2: Convert to fraction form
    21,143.97/29,180.70 = 11,715.57/x
  3. Step 3: Cross multiply
    21,143.97x = 29,180.70 × 11,715.57
  4. Step 4: Simplify right side
    21,143.97x = 341,868,533.50
  5. Step 5: Solve for x
    x = 341,868,533.50/21,143.97
  6. Step 6: Final answer
    x = 16,168.61

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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.