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Finding the Fourth Proportional to 15,993.11, 22,070.61 and 8,919.69

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Solution

The fourth proportional to 15,993.11, 22,070.61 and 8,919.69 is: 12,309.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,993.11 : 22,070.61 = 8,919.69 : x
  2. Step 2: Convert to fraction form
    15,993.11/22,070.61 = 8,919.69/x
  3. Step 3: Cross multiply
    15,993.11x = 22,070.61 × 8,919.69
  4. Step 4: Simplify right side
    15,993.11x = 196,862,999.31
  5. Step 5: Solve for x
    x = 196,862,999.31/15,993.11
  6. Step 6: Final answer
    x = 12,309.24

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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.