Home / 21,290.85-31,940.73-7,249.77

Finding the Fourth Proportional to 21,290.85, 31,940.73 and 7,249.77

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Solution

The fourth proportional to 21,290.85, 31,940.73 and 7,249.77 is: 10,876.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,290.85 : 31,940.73 = 7,249.77 : x
  2. Step 2: Convert to fraction form
    21,290.85/31,940.73 = 7,249.77/x
  3. Step 3: Cross multiply
    21,290.85x = 31,940.73 × 7,249.77
  4. Step 4: Simplify right side
    21,290.85x = 231,562,946.13
  5. Step 5: Solve for x
    x = 231,562,946.13/21,290.85
  6. Step 6: Final answer
    x = 10,876.17

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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.