Home / 12,540.23-18,698.23-12,195.78

Finding the Fourth Proportional to 12,540.23, 18,698.23 and 12,195.78

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Solution

The fourth proportional to 12,540.23, 18,698.23 and 12,195.78 is: 18,184.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,540.23 : 18,698.23 = 12,195.78 : x
  2. Step 2: Convert to fraction form
    12,540.23/18,698.23 = 12,195.78/x
  3. Step 3: Cross multiply
    12,540.23x = 18,698.23 × 12,195.78
  4. Step 4: Simplify right side
    12,540.23x = 228,039,499.47
  5. Step 5: Solve for x
    x = 228,039,499.47/12,540.23
  6. Step 6: Final answer
    x = 18,184.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.