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Finding the Fourth Proportional to 28,871.96, 39,853.89 and 16,945.29

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Solution

The fourth proportional to 28,871.96, 39,853.89 and 16,945.29 is: 23,390.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,871.96 : 39,853.89 = 16,945.29 : x
  2. Step 2: Convert to fraction form
    28,871.96/39,853.89 = 16,945.29/x
  3. Step 3: Cross multiply
    28,871.96x = 39,853.89 × 16,945.29
  4. Step 4: Simplify right side
    28,871.96x = 675,335,723.68
  5. Step 5: Solve for x
    x = 675,335,723.68/28,871.96
  6. Step 6: Final answer
    x = 23,390.72

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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.