Home / 21,143.43-29,177.87-12,190.85

Finding the Fourth Proportional to 21,143.43, 29,177.87 and 12,190.85

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Solution

The fourth proportional to 21,143.43, 29,177.87 and 12,190.85 is: 16,823.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,143.43 : 29,177.87 = 12,190.85 : x
  2. Step 2: Convert to fraction form
    21,143.43/29,177.87 = 12,190.85/x
  3. Step 3: Cross multiply
    21,143.43x = 29,177.87 × 12,190.85
  4. Step 4: Simplify right side
    21,143.43x = 355,703,171.76
  5. Step 5: Solve for x
    x = 355,703,171.76/21,143.43
  6. Step 6: Final answer
    x = 16,823.34

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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.