Home / 22,311.09-30,783.87-12,879.63

Finding the Fourth Proportional to 22,311.09, 30,783.87 and 12,879.63

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Solution

The fourth proportional to 22,311.09, 30,783.87 and 12,879.63 is: 17,770.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,311.09 : 30,783.87 = 12,879.63 : x
  2. Step 2: Convert to fraction form
    22,311.09/30,783.87 = 12,879.63/x
  3. Step 3: Cross multiply
    22,311.09x = 30,783.87 × 12,879.63
  4. Step 4: Simplify right side
    22,311.09x = 396,484,855.57
  5. Step 5: Solve for x
    x = 396,484,855.57/22,311.09
  6. Step 6: Final answer
    x = 17,770.75

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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.