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Finding the Fourth Proportional to 31,305.56, 43,201.56 and 18,733.28

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Solution

The fourth proportional to 31,305.56, 43,201.56 and 18,733.28 is: 25,851.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,305.56 : 43,201.56 = 18,733.28 : x
  2. Step 2: Convert to fraction form
    31,305.56/43,201.56 = 18,733.28/x
  3. Step 3: Cross multiply
    31,305.56x = 43,201.56 × 18,733.28
  4. Step 4: Simplify right side
    31,305.56x = 809,306,919.92
  5. Step 5: Solve for x
    x = 809,306,919.92/31,305.56
  6. Step 6: Final answer
    x = 25,851.86

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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.