Home / 21,196.83-31,826.45-11,855.15

Finding the Fourth Proportional to 21,196.83, 31,826.45 and 11,855.15

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Solution

The fourth proportional to 21,196.83, 31,826.45 and 11,855.15 is: 17,800.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,196.83 : 31,826.45 = 11,855.15 : x
  2. Step 2: Convert to fraction form
    21,196.83/31,826.45 = 11,855.15/x
  3. Step 3: Cross multiply
    21,196.83x = 31,826.45 × 11,855.15
  4. Step 4: Simplify right side
    21,196.83x = 377,307,338.72
  5. Step 5: Solve for x
    x = 377,307,338.72/21,196.83
  6. Step 6: Final answer
    x = 17,800.18

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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.