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Finding the Fourth Proportional to 8,485.31, 12,697.86 and 6,258.87

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Solution

The fourth proportional to 8,485.31, 12,697.86 and 6,258.87 is: 9,366.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,485.31 : 12,697.86 = 6,258.87 : x
  2. Step 2: Convert to fraction form
    8,485.31/12,697.86 = 6,258.87/x
  3. Step 3: Cross multiply
    8,485.31x = 12,697.86 × 6,258.87
  4. Step 4: Simplify right side
    8,485.31x = 79,474,278.49
  5. Step 5: Solve for x
    x = 79,474,278.49/8,485.31
  6. Step 6: Final answer
    x = 9,366.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.