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Finding the Fourth Proportional to 18,555.74, 27,839.75 and 12,340.20

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Solution

The fourth proportional to 18,555.74, 27,839.75 and 12,340.20 is: 18,514.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,555.74 : 27,839.75 = 12,340.20 : x
  2. Step 2: Convert to fraction form
    18,555.74/27,839.75 = 12,340.20/x
  3. Step 3: Cross multiply
    18,555.74x = 27,839.75 × 12,340.20
  4. Step 4: Simplify right side
    18,555.74x = 343,548,021.25
  5. Step 5: Solve for x
    x = 343,548,021.25/18,555.74
  6. Step 6: Final answer
    x = 18,514.38

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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.