Home / 21,168.90-29,213.40-11,609.66

Finding the Fourth Proportional to 21,168.90, 29,213.40 and 11,609.66

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Solution

The fourth proportional to 21,168.90, 29,213.40 and 11,609.66 is: 16,021.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,168.90 : 29,213.40 = 11,609.66 : x
  2. Step 2: Convert to fraction form
    21,168.90/29,213.40 = 11,609.66/x
  3. Step 3: Cross multiply
    21,168.90x = 29,213.40 × 11,609.66
  4. Step 4: Simplify right side
    21,168.90x = 339,157,495.38
  5. Step 5: Solve for x
    x = 339,157,495.38/21,168.90
  6. Step 6: Final answer
    x = 16,021.50

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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.