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Finding the Fourth Proportional to 7,118.87, 9,828.63 and 6,371.55

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Solution

The fourth proportional to 7,118.87, 9,828.63 and 6,371.55 is: 8,796.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,118.87 : 9,828.63 = 6,371.55 : x
  2. Step 2: Convert to fraction form
    7,118.87/9,828.63 = 6,371.55/x
  3. Step 3: Cross multiply
    7,118.87x = 9,828.63 × 6,371.55
  4. Step 4: Simplify right side
    7,118.87x = 62,623,607.48
  5. Step 5: Solve for x
    x = 62,623,607.48/7,118.87
  6. Step 6: Final answer
    x = 8,796.85

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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.