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Finding the Fourth Proportional to 12,339.60, 18,504 and 3,574.32

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Solution

The fourth proportional to 12,339.60, 18,504 and 3,574.32 is: 5,359.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,339.60 : 18,504 = 3,574.32 : x
  2. Step 2: Convert to fraction form
    12,339.60/18,504 = 3,574.32/x
  3. Step 3: Cross multiply
    12,339.60x = 18,504 × 3,574.32
  4. Step 4: Simplify right side
    12,339.60x = 66,139,217.28
  5. Step 5: Solve for x
    x = 66,139,217.28/12,339.60
  6. Step 6: Final answer
    x = 5,359.92

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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.