Home / 21,187.17-29,238.45-11,755.89

Finding the Fourth Proportional to 21,187.17, 29,238.45 and 11,755.89

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Solution

The fourth proportional to 21,187.17, 29,238.45 and 11,755.89 is: 16,223.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,187.17 : 29,238.45 = 11,755.89 : x
  2. Step 2: Convert to fraction form
    21,187.17/29,238.45 = 11,755.89/x
  3. Step 3: Cross multiply
    21,187.17x = 29,238.45 × 11,755.89
  4. Step 4: Simplify right side
    21,187.17x = 343,724,001.97
  5. Step 5: Solve for x
    x = 343,724,001.97/21,187.17
  6. Step 6: Final answer
    x = 16,223.21

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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.