Home / 12,540.42-18,786.33-6,688.98

Finding the Fourth Proportional to 12,540.42, 18,786.33 and 6,688.98

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Solution

The fourth proportional to 12,540.42, 18,786.33 and 6,688.98 is: 10,020.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,540.42 : 18,786.33 = 6,688.98 : x
  2. Step 2: Convert to fraction form
    12,540.42/18,786.33 = 6,688.98/x
  3. Step 3: Cross multiply
    12,540.42x = 18,786.33 × 6,688.98
  4. Step 4: Simplify right side
    12,540.42x = 125,661,385.64
  5. Step 5: Solve for x
    x = 125,661,385.64/12,540.42
  6. Step 6: Final answer
    x = 10,020.51

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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.