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Finding the Fourth Proportional to 8,586.93, 12,879.59 and 2,742.51

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Solution

The fourth proportional to 8,586.93, 12,879.59 and 2,742.51 is: 4,113.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,586.93 : 12,879.59 = 2,742.51 : x
  2. Step 2: Convert to fraction form
    8,586.93/12,879.59 = 2,742.51/x
  3. Step 3: Cross multiply
    8,586.93x = 12,879.59 × 2,742.51
  4. Step 4: Simplify right side
    8,586.93x = 35,322,390.66
  5. Step 5: Solve for x
    x = 35,322,390.66/8,586.93
  6. Step 6: Final answer
    x = 4,113.51

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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.