Home / 12,385.60-18,579-4,989.06

Finding the Fourth Proportional to 12,385.60, 18,579 and 4,989.06

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Solution

The fourth proportional to 12,385.60, 18,579 and 4,989.06 is: 7,483.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,385.60 : 18,579 = 4,989.06 : x
  2. Step 2: Convert to fraction form
    12,385.60/18,579 = 4,989.06/x
  3. Step 3: Cross multiply
    12,385.60x = 18,579 × 4,989.06
  4. Step 4: Simplify right side
    12,385.60x = 92,691,745.74
  5. Step 5: Solve for x
    x = 92,691,745.74/12,385.60
  6. Step 6: Final answer
    x = 7,483.83

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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.