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Finding the Fourth Proportional to 22,190.50, 30,622.89 and 12,254.50

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Solution

The fourth proportional to 22,190.50, 30,622.89 and 12,254.50 is: 16,911.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,190.50 : 30,622.89 = 12,254.50 : x
  2. Step 2: Convert to fraction form
    22,190.50/30,622.89 = 12,254.50/x
  3. Step 3: Cross multiply
    22,190.50x = 30,622.89 × 12,254.50
  4. Step 4: Simplify right side
    22,190.50x = 375,268,205.51
  5. Step 5: Solve for x
    x = 375,268,205.51/22,190.50
  6. Step 6: Final answer
    x = 16,911.21

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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.