Home / 12,388.47-18,580.68-3,621.35

Finding the Fourth Proportional to 12,388.47, 18,580.68 and 3,621.35

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Solution

The fourth proportional to 12,388.47, 18,580.68 and 3,621.35 is: 5,431.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,388.47 : 18,580.68 = 3,621.35 : x
  2. Step 2: Convert to fraction form
    12,388.47/18,580.68 = 3,621.35/x
  3. Step 3: Cross multiply
    12,388.47x = 18,580.68 × 3,621.35
  4. Step 4: Simplify right side
    12,388.47x = 67,287,052.61
  5. Step 5: Solve for x
    x = 67,287,052.61/12,388.47
  6. Step 6: Final answer
    x = 5,431.43

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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.