Home / 21,136.46-31,716.37-11,781.75

Finding the Fourth Proportional to 21,136.46, 31,716.37 and 11,781.75

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Solution

The fourth proportional to 21,136.46, 31,716.37 and 11,781.75 is: 17,679.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,136.46 : 31,716.37 = 11,781.75 : x
  2. Step 2: Convert to fraction form
    21,136.46/31,716.37 = 11,781.75/x
  3. Step 3: Cross multiply
    21,136.46x = 31,716.37 × 11,781.75
  4. Step 4: Simplify right side
    21,136.46x = 373,674,283.34
  5. Step 5: Solve for x
    x = 373,674,283.34/21,136.46
  6. Step 6: Final answer
    x = 17,679.13

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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.