Home / 40,131.52-55,379.36-21,981.31

Finding the Fourth Proportional to 40,131.52, 55,379.36 and 21,981.31

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Solution

The fourth proportional to 40,131.52, 55,379.36 and 21,981.31 is: 30,333.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,131.52 : 55,379.36 = 21,981.31 : x
  2. Step 2: Convert to fraction form
    40,131.52/55,379.36 = 21,981.31/x
  3. Step 3: Cross multiply
    40,131.52x = 55,379.36 × 21,981.31
  4. Step 4: Simplify right side
    40,131.52x = 1,217,310,709.10
  5. Step 5: Solve for x
    x = 1,217,310,709.10/40,131.52
  6. Step 6: Final answer
    x = 30,333.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.