Home / 21,622.14-29,836.15-12,190.70

Finding the Fourth Proportional to 21,622.14, 29,836.15 and 12,190.70

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Solution

The fourth proportional to 21,622.14, 29,836.15 and 12,190.70 is: 16,821.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,622.14 : 29,836.15 = 12,190.70 : x
  2. Step 2: Convert to fraction form
    21,622.14/29,836.15 = 12,190.70/x
  3. Step 3: Cross multiply
    21,622.14x = 29,836.15 × 12,190.70
  4. Step 4: Simplify right side
    21,622.14x = 363,723,597.92
  5. Step 5: Solve for x
    x = 363,723,597.92/21,622.14
  6. Step 6: Final answer
    x = 16,821.81

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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.