Home / 21,340.90-29,449.83-11,909.26

Finding the Fourth Proportional to 21,340.90, 29,449.83 and 11,909.26

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Solution

The fourth proportional to 21,340.90, 29,449.83 and 11,909.26 is: 16,434.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,340.90 : 29,449.83 = 11,909.26 : x
  2. Step 2: Convert to fraction form
    21,340.90/29,449.83 = 11,909.26/x
  3. Step 3: Cross multiply
    21,340.90x = 29,449.83 × 11,909.26
  4. Step 4: Simplify right side
    21,340.90x = 350,725,682.43
  5. Step 5: Solve for x
    x = 350,725,682.43/21,340.90
  6. Step 6: Final answer
    x = 16,434.44

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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.