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Finding the Fourth Proportional to 13,479.22, 20,222.49 and 7,639.93

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Solution

The fourth proportional to 13,479.22, 20,222.49 and 7,639.93 is: 11,461.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,479.22 : 20,222.49 = 7,639.93 : x
  2. Step 2: Convert to fraction form
    13,479.22/20,222.49 = 7,639.93/x
  3. Step 3: Cross multiply
    13,479.22x = 20,222.49 × 7,639.93
  4. Step 4: Simplify right side
    13,479.22x = 154,498,408.03
  5. Step 5: Solve for x
    x = 154,498,408.03/13,479.22
  6. Step 6: Final answer
    x = 11,461.97

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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.