Home / 21,399.21-29,530.89-11,967.75

Finding the Fourth Proportional to 21,399.21, 29,530.89 and 11,967.75

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Solution

The fourth proportional to 21,399.21, 29,530.89 and 11,967.75 is: 16,515.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,399.21 : 29,530.89 = 11,967.75 : x
  2. Step 2: Convert to fraction form
    21,399.21/29,530.89 = 11,967.75/x
  3. Step 3: Cross multiply
    21,399.21x = 29,530.89 × 11,967.75
  4. Step 4: Simplify right side
    21,399.21x = 353,418,308.80
  5. Step 5: Solve for x
    x = 353,418,308.80/21,399.21
  6. Step 6: Final answer
    x = 16,515.48

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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.