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Finding the Fourth Proportional to 12,485.73, 18,731.74 and 5,910.15

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Solution

The fourth proportional to 12,485.73, 18,731.74 and 5,910.15 is: 8,866.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,485.73 : 18,731.74 = 5,910.15 : x
  2. Step 2: Convert to fraction form
    12,485.73/18,731.74 = 5,910.15/x
  3. Step 3: Cross multiply
    12,485.73x = 18,731.74 × 5,910.15
  4. Step 4: Simplify right side
    12,485.73x = 110,707,393.16
  5. Step 5: Solve for x
    x = 110,707,393.16/12,485.73
  6. Step 6: Final answer
    x = 8,866.71

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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.