Home / 21,679.44-29,887.92-13,717.68

Finding the Fourth Proportional to 21,679.44, 29,887.92 and 13,717.68

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Solution

The fourth proportional to 21,679.44, 29,887.92 and 13,717.68 is: 18,911.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,679.44 : 29,887.92 = 13,717.68 : x
  2. Step 2: Convert to fraction form
    21,679.44/29,887.92 = 13,717.68/x
  3. Step 3: Cross multiply
    21,679.44x = 29,887.92 × 13,717.68
  4. Step 4: Simplify right side
    21,679.44x = 409,992,922.43
  5. Step 5: Solve for x
    x = 409,992,922.43/21,679.44
  6. Step 6: Final answer
    x = 18,911.60

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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.