Home / 17,136.20-25,655.70-13,215.80

Finding the Fourth Proportional to 17,136.20, 25,655.70 and 13,215.80

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Solution

The fourth proportional to 17,136.20, 25,655.70 and 13,215.80 is: 19,786.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,136.20 : 25,655.70 = 13,215.80 : x
  2. Step 2: Convert to fraction form
    17,136.20/25,655.70 = 13,215.80/x
  3. Step 3: Cross multiply
    17,136.20x = 25,655.70 × 13,215.80
  4. Step 4: Simplify right side
    17,136.20x = 339,060,600.06
  5. Step 5: Solve for x
    x = 339,060,600.06/17,136.20
  6. Step 6: Final answer
    x = 19,786.22

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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.