Home / 21,219.10-31,806.47-11,845.37

Finding the Fourth Proportional to 21,219.10, 31,806.47 and 11,845.37

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Solution

The fourth proportional to 21,219.10, 31,806.47 and 11,845.37 is: 17,755.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,219.10 : 31,806.47 = 11,845.37 : x
  2. Step 2: Convert to fraction form
    21,219.10/31,806.47 = 11,845.37/x
  3. Step 3: Cross multiply
    21,219.10x = 31,806.47 × 11,845.37
  4. Step 4: Simplify right side
    21,219.10x = 376,759,514.67
  5. Step 5: Solve for x
    x = 376,759,514.67/21,219.10
  6. Step 6: Final answer
    x = 17,755.68

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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.