Home / 12,540.69-18,840.20-7,350.21

Finding the Fourth Proportional to 12,540.69, 18,840.20 and 7,350.21

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Solution

The fourth proportional to 12,540.69, 18,840.20 and 7,350.21 is: 11,042.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,540.69 : 18,840.20 = 7,350.21 : x
  2. Step 2: Convert to fraction form
    12,540.69/18,840.20 = 7,350.21/x
  3. Step 3: Cross multiply
    12,540.69x = 18,840.20 × 7,350.21
  4. Step 4: Simplify right side
    12,540.69x = 138,479,389.69
  5. Step 5: Solve for x
    x = 138,479,389.69/12,540.69
  6. Step 6: Final answer
    x = 11,042.41

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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.