Home / 21,136.91-29,169.85-11,705.47

Finding the Fourth Proportional to 21,136.91, 29,169.85 and 11,705.47

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Solution

The fourth proportional to 21,136.91, 29,169.85 and 11,705.47 is: 16,154.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,136.91 : 29,169.85 = 11,705.47 : x
  2. Step 2: Convert to fraction form
    21,136.91/29,169.85 = 11,705.47/x
  3. Step 3: Cross multiply
    21,136.91x = 29,169.85 × 11,705.47
  4. Step 4: Simplify right side
    21,136.91x = 341,446,804.08
  5. Step 5: Solve for x
    x = 341,446,804.08/21,136.91
  6. Step 6: Final answer
    x = 16,154.05

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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.