Home / 21,623.05-29,839.81-12,191.61

Finding the Fourth Proportional to 21,623.05, 29,839.81 and 12,191.61

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Solution

The fourth proportional to 21,623.05, 29,839.81 and 12,191.61 is: 16,824.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,623.05 : 29,839.81 = 12,191.61 : x
  2. Step 2: Convert to fraction form
    21,623.05/29,839.81 = 12,191.61/x
  3. Step 3: Cross multiply
    21,623.05x = 29,839.81 × 12,191.61
  4. Step 4: Simplify right side
    21,623.05x = 363,795,325.99
  5. Step 5: Solve for x
    x = 363,795,325.99/21,623.05
  6. Step 6: Final answer
    x = 16,824.43

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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.