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Finding the Fourth Proportional to 7,119.05, 9,828.91 and 6,371.72

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Solution

The fourth proportional to 7,119.05, 9,828.91 and 6,371.72 is: 8,797.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,119.05 : 9,828.91 = 6,371.72 : x
  2. Step 2: Convert to fraction form
    7,119.05/9,828.91 = 6,371.72/x
  3. Step 3: Cross multiply
    7,119.05x = 9,828.91 × 6,371.72
  4. Step 4: Simplify right side
    7,119.05x = 62,627,021.25
  5. Step 5: Solve for x
    x = 62,627,021.25/7,119.05
  6. Step 6: Final answer
    x = 8,797.10

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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.