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Finding the Fourth Proportional to 9,361.17, 12,919.73 and 5,382.21

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Solution

The fourth proportional to 9,361.17, 12,919.73 and 5,382.21 is: 7,428.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,361.17 : 12,919.73 = 5,382.21 : x
  2. Step 2: Convert to fraction form
    9,361.17/12,919.73 = 5,382.21/x
  3. Step 3: Cross multiply
    9,361.17x = 12,919.73 × 5,382.21
  4. Step 4: Simplify right side
    9,361.17x = 69,536,673.09
  5. Step 5: Solve for x
    x = 69,536,673.09/9,361.17
  6. Step 6: Final answer
    x = 7,428.20

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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.