Home / 21,211.14-31,805.83-11,221.28

Finding the Fourth Proportional to 21,211.14, 31,805.83 and 11,221.28

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Solution

The fourth proportional to 21,211.14, 31,805.83 and 11,221.28 is: 16,826.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,211.14 : 31,805.83 = 11,221.28 : x
  2. Step 2: Convert to fraction form
    21,211.14/31,805.83 = 11,221.28/x
  3. Step 3: Cross multiply
    21,211.14x = 31,805.83 × 11,221.28
  4. Step 4: Simplify right side
    21,211.14x = 356,902,124.06
  5. Step 5: Solve for x
    x = 356,902,124.06/21,211.14
  6. Step 6: Final answer
    x = 16,826.16

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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.