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Finding the Fourth Proportional to 7,339.62, 10,128.62 and 3,982.36

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Solution

The fourth proportional to 7,339.62, 10,128.62 and 3,982.36 is: 5,495.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,339.62 : 10,128.62 = 3,982.36 : x
  2. Step 2: Convert to fraction form
    7,339.62/10,128.62 = 3,982.36/x
  3. Step 3: Cross multiply
    7,339.62x = 10,128.62 × 3,982.36
  4. Step 4: Simplify right side
    7,339.62x = 40,335,811.14
  5. Step 5: Solve for x
    x = 40,335,811.14/7,339.62
  6. Step 6: Final answer
    x = 5,495.63

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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.