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Finding the Fourth Proportional to 12,600.80, 18,900.44 and 5,578.76

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Solution

The fourth proportional to 12,600.80, 18,900.44 and 5,578.76 is: 8,367.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,600.80 : 18,900.44 = 5,578.76 : x
  2. Step 2: Convert to fraction form
    12,600.80/18,900.44 = 5,578.76/x
  3. Step 3: Cross multiply
    12,600.80x = 18,900.44 × 5,578.76
  4. Step 4: Simplify right side
    12,600.80x = 105,441,018.65
  5. Step 5: Solve for x
    x = 105,441,018.65/12,600.80
  6. Step 6: Final answer
    x = 8,367.80

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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.