Home / 31,235.63-43,105.77-18,660.38

Finding the Fourth Proportional to 31,235.63, 43,105.77 and 18,660.38

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Solution

The fourth proportional to 31,235.63, 43,105.77 and 18,660.38 is: 25,751.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,235.63 : 43,105.77 = 18,660.38 : x
  2. Step 2: Convert to fraction form
    31,235.63/43,105.77 = 18,660.38/x
  3. Step 3: Cross multiply
    31,235.63x = 43,105.77 × 18,660.38
  4. Step 4: Simplify right side
    31,235.63x = 804,369,832.86
  5. Step 5: Solve for x
    x = 804,369,832.86/31,235.63
  6. Step 6: Final answer
    x = 25,751.68

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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.