Home / 12,318.43-18,478.03-4,821.70

Finding the Fourth Proportional to 12,318.43, 18,478.03 and 4,821.70

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Solution

The fourth proportional to 12,318.43, 18,478.03 and 4,821.70 is: 7,232.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,318.43 : 18,478.03 = 4,821.70 : x
  2. Step 2: Convert to fraction form
    12,318.43/18,478.03 = 4,821.70/x
  3. Step 3: Cross multiply
    12,318.43x = 18,478.03 × 4,821.70
  4. Step 4: Simplify right side
    12,318.43x = 89,095,517.25
  5. Step 5: Solve for x
    x = 89,095,517.25/12,318.43
  6. Step 6: Final answer
    x = 7,232.70

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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.