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Finding the Fourth Proportional to 28,857.90, 39,825.90 and 16,113.58

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Solution

The fourth proportional to 28,857.90, 39,825.90 and 16,113.58 is: 22,237.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,857.90 : 39,825.90 = 16,113.58 : x
  2. Step 2: Convert to fraction form
    28,857.90/39,825.90 = 16,113.58/x
  3. Step 3: Cross multiply
    28,857.90x = 39,825.90 × 16,113.58
  4. Step 4: Simplify right side
    28,857.90x = 641,737,825.72
  5. Step 5: Solve for x
    x = 641,737,825.72/28,857.90
  6. Step 6: Final answer
    x = 22,237.86

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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.