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Finding the Fourth Proportional to 12,339.09, 18,509.00 and 3,105.09

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Solution

The fourth proportional to 12,339.09, 18,509.00 and 3,105.09 is: 4,657.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,339.09 : 18,509.00 = 3,105.09 : x
  2. Step 2: Convert to fraction form
    12,339.09/18,509.00 = 3,105.09/x
  3. Step 3: Cross multiply
    12,339.09x = 18,509.00 × 3,105.09
  4. Step 4: Simplify right side
    12,339.09x = 57,472,095.28
  5. Step 5: Solve for x
    x = 57,472,095.28/12,339.09
  6. Step 6: Final answer
    x = 4,657.73

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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.