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Finding the Fourth Proportional to 8,551.60, 12,825.60 and 3,621.40

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Solution

The fourth proportional to 8,551.60, 12,825.60 and 3,621.40 is: 5,431.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,551.60 : 12,825.60 = 3,621.40 : x
  2. Step 2: Convert to fraction form
    8,551.60/12,825.60 = 3,621.40/x
  3. Step 3: Cross multiply
    8,551.60x = 12,825.60 × 3,621.40
  4. Step 4: Simplify right side
    8,551.60x = 46,446,627.84
  5. Step 5: Solve for x
    x = 46,446,627.84/8,551.60
  6. Step 6: Final answer
    x = 5,431.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.