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Finding the Fourth Proportional to 19,919.93, 29,866.03 and 8,820.56

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Solution

The fourth proportional to 19,919.93, 29,866.03 and 8,820.56 is: 13,224.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,919.93 : 29,866.03 = 8,820.56 : x
  2. Step 2: Convert to fraction form
    19,919.93/29,866.03 = 8,820.56/x
  3. Step 3: Cross multiply
    19,919.93x = 29,866.03 × 8,820.56
  4. Step 4: Simplify right side
    19,919.93x = 263,435,162.19
  5. Step 5: Solve for x
    x = 263,435,162.19/19,919.93
  6. Step 6: Final answer
    x = 13,224.71

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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.