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Finding the Fourth Proportional to 12,739.74, 19,084.74 and 8,343.87

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Solution

The fourth proportional to 12,739.74, 19,084.74 and 8,343.87 is: 12,499.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,739.74 : 19,084.74 = 8,343.87 : x
  2. Step 2: Convert to fraction form
    12,739.74/19,084.74 = 8,343.87/x
  3. Step 3: Cross multiply
    12,739.74x = 19,084.74 × 8,343.87
  4. Step 4: Simplify right side
    12,739.74x = 159,240,589.54
  5. Step 5: Solve for x
    x = 159,240,589.54/12,739.74
  6. Step 6: Final answer
    x = 12,499.52

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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.