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Finding the Fourth Proportional to 18,085.78, 27,129.60 and 6,239.50

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Solution

The fourth proportional to 18,085.78, 27,129.60 and 6,239.50 is: 9,359.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,085.78 : 27,129.60 = 6,239.50 : x
  2. Step 2: Convert to fraction form
    18,085.78/27,129.60 = 6,239.50/x
  3. Step 3: Cross multiply
    18,085.78x = 27,129.60 × 6,239.50
  4. Step 4: Simplify right side
    18,085.78x = 169,275,139.20
  5. Step 5: Solve for x
    x = 169,275,139.20/18,085.78
  6. Step 6: Final answer
    x = 9,359.57

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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.