Home / 12,912.29-19,343.76-8,731.81

Finding the Fourth Proportional to 12,912.29, 19,343.76 and 8,731.81

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Solution

The fourth proportional to 12,912.29, 19,343.76 and 8,731.81 is: 13,081.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,912.29 : 19,343.76 = 8,731.81 : x
  2. Step 2: Convert to fraction form
    12,912.29/19,343.76 = 8,731.81/x
  3. Step 3: Cross multiply
    12,912.29x = 19,343.76 × 8,731.81
  4. Step 4: Simplify right side
    12,912.29x = 168,906,037.01
  5. Step 5: Solve for x
    x = 168,906,037.01/12,912.29
  6. Step 6: Final answer
    x = 13,081.03

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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.