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Finding the Fourth Proportional to 28,200.87, 38,917.26 and 15,625.62

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Solution

The fourth proportional to 28,200.87, 38,917.26 and 15,625.62 is: 21,563.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,200.87 : 38,917.26 = 15,625.62 : x
  2. Step 2: Convert to fraction form
    28,200.87/38,917.26 = 15,625.62/x
  3. Step 3: Cross multiply
    28,200.87x = 38,917.26 × 15,625.62
  4. Step 4: Simplify right side
    28,200.87x = 608,106,316.20
  5. Step 5: Solve for x
    x = 608,106,316.20/28,200.87
  6. Step 6: Final answer
    x = 21,563.39

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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.