Home / 21,136.42-31,735.68-20,763.10

Finding the Fourth Proportional to 21,136.42, 31,735.68 and 20,763.10

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Solution

The fourth proportional to 21,136.42, 31,735.68 and 20,763.10 is: 31,175.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,136.42 : 31,735.68 = 20,763.10 : x
  2. Step 2: Convert to fraction form
    21,136.42/31,735.68 = 20,763.10/x
  3. Step 3: Cross multiply
    21,136.42x = 31,735.68 × 20,763.10
  4. Step 4: Simplify right side
    21,136.42x = 658,931,097.41
  5. Step 5: Solve for x
    x = 658,931,097.41/21,136.42
  6. Step 6: Final answer
    x = 31,175.15

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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.