Home / 15,974.24-21,991.20-11,988.68

Finding the Fourth Proportional to 15,974.24, 21,991.20 and 11,988.68

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Solution

The fourth proportional to 15,974.24, 21,991.20 and 11,988.68 is: 16,504.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,974.24 : 21,991.20 = 11,988.68 : x
  2. Step 2: Convert to fraction form
    15,974.24/21,991.20 = 11,988.68/x
  3. Step 3: Cross multiply
    15,974.24x = 21,991.20 × 11,988.68
  4. Step 4: Simplify right side
    15,974.24x = 263,645,459.62
  5. Step 5: Solve for x
    x = 263,645,459.62/15,974.24
  6. Step 6: Final answer
    x = 16,504.41

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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.