Home / 21,756.12-29,997.18-18,393

Finding the Fourth Proportional to 21,756.12, 29,997.18 and 18,393

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Solution

The fourth proportional to 21,756.12, 29,997.18 and 18,393 is: 25,360.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,756.12 : 29,997.18 = 18,393 : x
  2. Step 2: Convert to fraction form
    21,756.12/29,997.18 = 18,393/x
  3. Step 3: Cross multiply
    21,756.12x = 29,997.18 × 18,393
  4. Step 4: Simplify right side
    21,756.12x = 551,738,131.74
  5. Step 5: Solve for x
    x = 551,738,131.74/21,756.12
  6. Step 6: Final answer
    x = 25,360.13

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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.