Home / 21,091.68-29,108.16-11,661.12

Finding the Fourth Proportional to 21,091.68, 29,108.16 and 11,661.12

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Solution

The fourth proportional to 21,091.68, 29,108.16 and 11,661.12 is: 16,093.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,091.68 : 29,108.16 = 11,661.12 : x
  2. Step 2: Convert to fraction form
    21,091.68/29,108.16 = 11,661.12/x
  3. Step 3: Cross multiply
    21,091.68x = 29,108.16 × 11,661.12
  4. Step 4: Simplify right side
    21,091.68x = 339,433,746.74
  5. Step 5: Solve for x
    x = 339,433,746.74/21,091.68
  6. Step 6: Final answer
    x = 16,093.25

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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.