Home / 21,131.36-29,162.19-11,699.92

Finding the Fourth Proportional to 21,131.36, 29,162.19 and 11,699.92

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Solution

The fourth proportional to 21,131.36, 29,162.19 and 11,699.92 is: 16,146.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,131.36 : 29,162.19 = 11,699.92 : x
  2. Step 2: Convert to fraction form
    21,131.36/29,162.19 = 11,699.92/x
  3. Step 3: Cross multiply
    21,131.36x = 29,162.19 × 11,699.92
  4. Step 4: Simplify right side
    21,131.36x = 341,195,290.02
  5. Step 5: Solve for x
    x = 341,195,290.02/21,131.36
  6. Step 6: Final answer
    x = 16,146.40

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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.