Home / 21,136.53-29,187.81-13,600.50

Finding the Fourth Proportional to 21,136.53, 29,187.81 and 13,600.50

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Solution

The fourth proportional to 21,136.53, 29,187.81 and 13,600.50 is: 18,781.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,136.53 : 29,187.81 = 13,600.50 : x
  2. Step 2: Convert to fraction form
    21,136.53/29,187.81 = 13,600.50/x
  3. Step 3: Cross multiply
    21,136.53x = 29,187.81 × 13,600.50
  4. Step 4: Simplify right side
    21,136.53x = 396,968,809.91
  5. Step 5: Solve for x
    x = 396,968,809.91/21,136.53
  6. Step 6: Final answer
    x = 18,781.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.