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Finding the Fourth Proportional to 22,390.50, 30,896.87 and 12,319.37

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Solution

The fourth proportional to 22,390.50, 30,896.87 and 12,319.37 is: 16,999.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,390.50 : 30,896.87 = 12,319.37 : x
  2. Step 2: Convert to fraction form
    22,390.50/30,896.87 = 12,319.37/x
  3. Step 3: Cross multiply
    22,390.50x = 30,896.87 × 12,319.37
  4. Step 4: Simplify right side
    22,390.50x = 380,629,757.29
  5. Step 5: Solve for x
    x = 380,629,757.29/22,390.50
  6. Step 6: Final answer
    x = 16,999.61

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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.