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Finding the Fourth Proportional to 15,993.89, 22,072.44 and 8,920.28

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Solution

The fourth proportional to 15,993.89, 22,072.44 and 8,920.28 is: 12,310.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,993.89 : 22,072.44 = 8,920.28 : x
  2. Step 2: Convert to fraction form
    15,993.89/22,072.44 = 8,920.28/x
  3. Step 3: Cross multiply
    15,993.89x = 22,072.44 × 8,920.28
  4. Step 4: Simplify right side
    15,993.89x = 196,892,345.08
  5. Step 5: Solve for x
    x = 196,892,345.08/15,993.89
  6. Step 6: Final answer
    x = 12,310.47

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1.5x scale

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.