Home / 12,378.09-18,558.82-4,874.79

Finding the Fourth Proportional to 12,378.09, 18,558.82 and 4,874.79

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Solution

The fourth proportional to 12,378.09, 18,558.82 and 4,874.79 is: 7,308.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,378.09 : 18,558.82 = 4,874.79 : x
  2. Step 2: Convert to fraction form
    12,378.09/18,558.82 = 4,874.79/x
  3. Step 3: Cross multiply
    12,378.09x = 18,558.82 × 4,874.79
  4. Step 4: Simplify right side
    12,378.09x = 90,470,350.15
  5. Step 5: Solve for x
    x = 90,470,350.15/12,378.09
  6. Step 6: Final answer
    x = 7,308.91

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1.5x scale

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.