Home / 21,133.25-29,163.83-12,180.69

Finding the Fourth Proportional to 21,133.25, 29,163.83 and 12,180.69

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Solution

The fourth proportional to 21,133.25, 29,163.83 and 12,180.69 is: 16,809.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,133.25 : 29,163.83 = 12,180.69 : x
  2. Step 2: Convert to fraction form
    21,133.25/29,163.83 = 12,180.69/x
  3. Step 3: Cross multiply
    21,133.25x = 29,163.83 × 12,180.69
  4. Step 4: Simplify right side
    21,133.25x = 355,235,426.62
  5. Step 5: Solve for x
    x = 355,235,426.62/21,133.25
  6. Step 6: Final answer
    x = 16,809.32

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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.