Home / 21,318.64-29,418.48-11,887.84

Finding the Fourth Proportional to 21,318.64, 29,418.48 and 11,887.84

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Solution

The fourth proportional to 21,318.64, 29,418.48 and 11,887.84 is: 16,404.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,318.64 : 29,418.48 = 11,887.84 : x
  2. Step 2: Convert to fraction form
    21,318.64/29,418.48 = 11,887.84/x
  3. Step 3: Cross multiply
    21,318.64x = 29,418.48 × 11,887.84
  4. Step 4: Simplify right side
    21,318.64x = 349,722,183.28
  5. Step 5: Solve for x
    x = 349,722,183.28/21,318.64
  6. Step 6: Final answer
    x = 16,404.53

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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.