Home / 31,621.78-43,636.92-18,195.12

Finding the Fourth Proportional to 31,621.78, 43,636.92 and 18,195.12

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Solution

The fourth proportional to 31,621.78, 43,636.92 and 18,195.12 is: 25,108.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,621.78 : 43,636.92 = 18,195.12 : x
  2. Step 2: Convert to fraction form
    31,621.78/43,636.92 = 18,195.12/x
  3. Step 3: Cross multiply
    31,621.78x = 43,636.92 × 18,195.12
  4. Step 4: Simplify right side
    31,621.78x = 793,978,995.83
  5. Step 5: Solve for x
    x = 793,978,995.83/31,621.78
  6. Step 6: Final answer
    x = 25,108.61

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1.5x scale

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.