Home / 31,212.48-43,078.32-18,644.64

Finding the Fourth Proportional to 31,212.48, 43,078.32 and 18,644.64

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Solution

The fourth proportional to 31,212.48, 43,078.32 and 18,644.64 is: 25,732.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,212.48 : 43,078.32 = 18,644.64 : x
  2. Step 2: Convert to fraction form
    31,212.48/43,078.32 = 18,644.64/x
  3. Step 3: Cross multiply
    31,212.48x = 43,078.32 × 18,644.64
  4. Step 4: Simplify right side
    31,212.48x = 803,179,768.20
  5. Step 5: Solve for x
    x = 803,179,768.20/31,212.48
  6. Step 6: Final answer
    x = 25,732.65

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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.