Home / 22,320.09-30,800.66-12,891.69

Finding the Fourth Proportional to 22,320.09, 30,800.66 and 12,891.69

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Solution

The fourth proportional to 22,320.09, 30,800.66 and 12,891.69 is: 17,789.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,320.09 : 30,800.66 = 12,891.69 : x
  2. Step 2: Convert to fraction form
    22,320.09/30,800.66 = 12,891.69/x
  3. Step 3: Cross multiply
    22,320.09x = 30,800.66 × 12,891.69
  4. Step 4: Simplify right side
    22,320.09x = 397,072,496.06
  5. Step 5: Solve for x
    x = 397,072,496.06/22,320.09
  6. Step 6: Final answer
    x = 17,789.91

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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.