Home / 21,238.68-29,310.13-11,679.30

Finding the Fourth Proportional to 21,238.68, 29,310.13 and 11,679.30

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Solution

The fourth proportional to 21,238.68, 29,310.13 and 11,679.30 is: 16,117.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,238.68 : 29,310.13 = 11,679.30 : x
  2. Step 2: Convert to fraction form
    21,238.68/29,310.13 = 11,679.30/x
  3. Step 3: Cross multiply
    21,238.68x = 29,310.13 × 11,679.30
  4. Step 4: Simplify right side
    21,238.68x = 342,321,801.31
  5. Step 5: Solve for x
    x = 342,321,801.31/21,238.68
  6. Step 6: Final answer
    x = 16,117.85

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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.