Home / 21,172.72-29,218.44-11,742.16

Finding the Fourth Proportional to 21,172.72, 29,218.44 and 11,742.16

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Solution

The fourth proportional to 21,172.72, 29,218.44 and 11,742.16 is: 16,204.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,172.72 : 29,218.44 = 11,742.16 : x
  2. Step 2: Convert to fraction form
    21,172.72/29,218.44 = 11,742.16/x
  3. Step 3: Cross multiply
    21,172.72x = 29,218.44 × 11,742.16
  4. Step 4: Simplify right side
    21,172.72x = 343,087,597.43
  5. Step 5: Solve for x
    x = 343,087,597.43/21,172.72
  6. Step 6: Final answer
    x = 16,204.23

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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.