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Finding the Fourth Proportional to 12,736.51, 19,079.90 and 8,340.64

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Solution

The fourth proportional to 12,736.51, 19,079.90 and 8,340.64 is: 12,494.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,736.51 : 19,079.90 = 8,340.64 : x
  2. Step 2: Convert to fraction form
    12,736.51/19,079.90 = 8,340.64/x
  3. Step 3: Cross multiply
    12,736.51x = 19,079.90 × 8,340.64
  4. Step 4: Simplify right side
    12,736.51x = 159,138,481.74
  5. Step 5: Solve for x
    x = 159,138,481.74/12,736.51
  6. Step 6: Final answer
    x = 12,494.67

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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.