Home / 21,328.20-31,992.30-11,472.12

Finding the Fourth Proportional to 21,328.20, 31,992.30 and 11,472.12

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Solution

The fourth proportional to 21,328.20, 31,992.30 and 11,472.12 is: 17,208.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,328.20 : 31,992.30 = 11,472.12 : x
  2. Step 2: Convert to fraction form
    21,328.20/31,992.30 = 11,472.12/x
  3. Step 3: Cross multiply
    21,328.20x = 31,992.30 × 11,472.12
  4. Step 4: Simplify right side
    21,328.20x = 367,019,504.68
  5. Step 5: Solve for x
    x = 367,019,504.68/21,328.20
  6. Step 6: Final answer
    x = 17,208.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.