Home / 21,081.11-31,612.39-11,218.04

Finding the Fourth Proportional to 21,081.11, 31,612.39 and 11,218.04

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Solution

The fourth proportional to 21,081.11, 31,612.39 and 11,218.04 is: 16,822.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,081.11 : 31,612.39 = 11,218.04 : x
  2. Step 2: Convert to fraction form
    21,081.11/31,612.39 = 11,218.04/x
  3. Step 3: Cross multiply
    21,081.11x = 31,612.39 × 11,218.04
  4. Step 4: Simplify right side
    21,081.11x = 354,628,999.43
  5. Step 5: Solve for x
    x = 354,628,999.43/21,081.11
  6. Step 6: Final answer
    x = 16,822.13

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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.