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Finding the Fourth Proportional to 12,356.65, 18,535.44 and 3,591.64

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Solution

The fourth proportional to 12,356.65, 18,535.44 and 3,591.64 is: 5,387.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,356.65 : 18,535.44 = 3,591.64 : x
  2. Step 2: Convert to fraction form
    12,356.65/18,535.44 = 3,591.64/x
  3. Step 3: Cross multiply
    12,356.65x = 18,535.44 × 3,591.64
  4. Step 4: Simplify right side
    12,356.65x = 66,572,627.72
  5. Step 5: Solve for x
    x = 66,572,627.72/12,356.65
  6. Step 6: Final answer
    x = 5,387.60

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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.