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Finding the Fourth Proportional to 28,917.47, 39,910.73 and 16,980.73

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Solution

The fourth proportional to 28,917.47, 39,910.73 and 16,980.73 is: 23,436.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,917.47 : 39,910.73 = 16,980.73 : x
  2. Step 2: Convert to fraction form
    28,917.47/39,910.73 = 16,980.73/x
  3. Step 3: Cross multiply
    28,917.47x = 39,910.73 × 16,980.73
  4. Step 4: Simplify right side
    28,917.47x = 677,713,145.55
  5. Step 5: Solve for x
    x = 677,713,145.55/28,917.47
  6. Step 6: Final answer
    x = 23,436.11

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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.