Home / 21,113.91-29,136.78-11,682.47

Finding the Fourth Proportional to 21,113.91, 29,136.78 and 11,682.47

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Solution

The fourth proportional to 21,113.91, 29,136.78 and 11,682.47 is: 16,121.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,113.91 : 29,136.78 = 11,682.47 : x
  2. Step 2: Convert to fraction form
    21,113.91/29,136.78 = 11,682.47/x
  3. Step 3: Cross multiply
    21,113.91x = 29,136.78 × 11,682.47
  4. Step 4: Simplify right side
    21,113.91x = 340,389,631.09
  5. Step 5: Solve for x
    x = 340,389,631.09/21,113.91
  6. Step 6: Final answer
    x = 16,121.58

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1.5x scale

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.