Home / 21,187.09-29,240.36-11,755.72

Finding the Fourth Proportional to 21,187.09, 29,240.36 and 11,755.72

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Solution

The fourth proportional to 21,187.09, 29,240.36 and 11,755.72 is: 16,224.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,187.09 : 29,240.36 = 11,755.72 : x
  2. Step 2: Convert to fraction form
    21,187.09/29,240.36 = 11,755.72/x
  3. Step 3: Cross multiply
    21,187.09x = 29,240.36 × 11,755.72
  4. Step 4: Simplify right side
    21,187.09x = 343,741,484.86
  5. Step 5: Solve for x
    x = 343,741,484.86/21,187.09
  6. Step 6: Final answer
    x = 16,224.10

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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.