Home / 21,318-29,418.84-11,887.17

Finding the Fourth Proportional to 21,318, 29,418.84 and 11,887.17

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Solution

The fourth proportional to 21,318, 29,418.84 and 11,887.17 is: 16,404.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,318 : 29,418.84 = 11,887.17 : x
  2. Step 2: Convert to fraction form
    21,318/29,418.84 = 11,887.17/x
  3. Step 3: Cross multiply
    21,318x = 29,418.84 × 11,887.17
  4. Step 4: Simplify right side
    21,318x = 349,706,752.28
  5. Step 5: Solve for x
    x = 349,706,752.28/21,318
  6. Step 6: Final answer
    x = 16,404.29

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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.