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Finding the Fourth Proportional to 28,760.70, 39,689.70 and 16,185.48

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Solution

The fourth proportional to 28,760.70, 39,689.70 and 16,185.48 is: 22,335.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,760.70 : 39,689.70 = 16,185.48 : x
  2. Step 2: Convert to fraction form
    28,760.70/39,689.70 = 16,185.48/x
  3. Step 3: Cross multiply
    28,760.70x = 39,689.70 × 16,185.48
  4. Step 4: Simplify right side
    28,760.70x = 642,396,845.56
  5. Step 5: Solve for x
    x = 642,396,845.56/28,760.70
  6. Step 6: Final answer
    x = 22,335.93

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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.