Home / 12,622.05-18,921-4,722.42

Finding the Fourth Proportional to 12,622.05, 18,921 and 4,722.42

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Solution

The fourth proportional to 12,622.05, 18,921 and 4,722.42 is: 7,079.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,622.05 : 18,921 = 4,722.42 : x
  2. Step 2: Convert to fraction form
    12,622.05/18,921 = 4,722.42/x
  3. Step 3: Cross multiply
    12,622.05x = 18,921 × 4,722.42
  4. Step 4: Simplify right side
    12,622.05x = 89,352,908.82
  5. Step 5: Solve for x
    x = 89,352,908.82/12,622.05
  6. Step 6: Final answer
    x = 7,079.11

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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.