Home / 21,161.25-29,203.54-11,729.81

Finding the Fourth Proportional to 21,161.25, 29,203.54 and 11,729.81

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Solution

The fourth proportional to 21,161.25, 29,203.54 and 11,729.81 is: 16,187.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,161.25 : 29,203.54 = 11,729.81 : x
  2. Step 2: Convert to fraction form
    21,161.25/29,203.54 = 11,729.81/x
  3. Step 3: Cross multiply
    21,161.25x = 29,203.54 × 11,729.81
  4. Step 4: Simplify right side
    21,161.25x = 342,552,019.21
  5. Step 5: Solve for x
    x = 342,552,019.21/21,161.25
  6. Step 6: Final answer
    x = 16,187.70

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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.