Home / 21,289.96-31,933.68-8,136.36

Finding the Fourth Proportional to 21,289.96, 31,933.68 and 8,136.36

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Solution

The fourth proportional to 21,289.96, 31,933.68 and 8,136.36 is: 12,204.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,289.96 : 31,933.68 = 8,136.36 : x
  2. Step 2: Convert to fraction form
    21,289.96/31,933.68 = 8,136.36/x
  3. Step 3: Cross multiply
    21,289.96x = 31,933.68 × 8,136.36
  4. Step 4: Simplify right side
    21,289.96x = 259,823,916.60
  5. Step 5: Solve for x
    x = 259,823,916.60/21,289.96
  6. Step 6: Final answer
    x = 12,204.06

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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.