Home / 21,113.13-29,136.72-11,682.30

Finding the Fourth Proportional to 21,113.13, 29,136.72 and 11,682.30

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Solution

The fourth proportional to 21,113.13, 29,136.72 and 11,682.30 is: 16,121.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,113.13 : 29,136.72 = 11,682.30 : x
  2. Step 2: Convert to fraction form
    21,113.13/29,136.72 = 11,682.30/x
  3. Step 3: Cross multiply
    21,113.13x = 29,136.72 × 11,682.30
  4. Step 4: Simplify right side
    21,113.13x = 340,383,904.06
  5. Step 5: Solve for x
    x = 340,383,904.06/21,113.13
  6. Step 6: Final answer
    x = 16,121.91

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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.