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Finding the Fourth Proportional to 7,619, 10,515.66 and 4,307

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Solution

The fourth proportional to 7,619, 10,515.66 and 4,307 is: 5,944.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,619 : 10,515.66 = 4,307 : x
  2. Step 2: Convert to fraction form
    7,619/10,515.66 = 4,307/x
  3. Step 3: Cross multiply
    7,619x = 10,515.66 × 4,307
  4. Step 4: Simplify right side
    7,619x = 45,290,947.62
  5. Step 5: Solve for x
    x = 45,290,947.62/7,619
  6. Step 6: Final answer
    x = 5,944.47

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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.