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Finding the Fourth Proportional to 9,363.69, 12,922.70 and 5,172.75

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Solution

The fourth proportional to 9,363.69, 12,922.70 and 5,172.75 is: 7,138.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,363.69 : 12,922.70 = 5,172.75 : x
  2. Step 2: Convert to fraction form
    9,363.69/12,922.70 = 5,172.75/x
  3. Step 3: Cross multiply
    9,363.69x = 12,922.70 × 5,172.75
  4. Step 4: Simplify right side
    9,363.69x = 66,845,896.43
  5. Step 5: Solve for x
    x = 66,845,896.43/9,363.69
  6. Step 6: Final answer
    x = 7,138.84

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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.