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Finding the Fourth Proportional to 12,222.70, 18,321.90 and 5,637.40

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Solution

The fourth proportional to 12,222.70, 18,321.90 and 5,637.40 is: 8,450.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,222.70 : 18,321.90 = 5,637.40 : x
  2. Step 2: Convert to fraction form
    12,222.70/18,321.90 = 5,637.40/x
  3. Step 3: Cross multiply
    12,222.70x = 18,321.90 × 5,637.40
  4. Step 4: Simplify right side
    12,222.70x = 103,287,879.06
  5. Step 5: Solve for x
    x = 103,287,879.06/12,222.70
  6. Step 6: Final answer
    x = 8,450.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.