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Finding the Fourth Proportional to 9,919.73, 13,689.72 and 5,443.44

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Solution

The fourth proportional to 9,919.73, 13,689.72 and 5,443.44 is: 7,512.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,919.73 : 13,689.72 = 5,443.44 : x
  2. Step 2: Convert to fraction form
    9,919.73/13,689.72 = 5,443.44/x
  3. Step 3: Cross multiply
    9,919.73x = 13,689.72 × 5,443.44
  4. Step 4: Simplify right side
    9,919.73x = 74,519,169.44
  5. Step 5: Solve for x
    x = 74,519,169.44/9,919.73
  6. Step 6: Final answer
    x = 7,512.22

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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.