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Finding the Fourth Proportional to 8,702.82, 12,009.60 and 5,163.96

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Solution

The fourth proportional to 8,702.82, 12,009.60 and 5,163.96 is: 7,126.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,702.82 : 12,009.60 = 5,163.96 : x
  2. Step 2: Convert to fraction form
    8,702.82/12,009.60 = 5,163.96/x
  3. Step 3: Cross multiply
    8,702.82x = 12,009.60 × 5,163.96
  4. Step 4: Simplify right side
    8,702.82x = 62,017,094.02
  5. Step 5: Solve for x
    x = 62,017,094.02/8,702.82
  6. Step 6: Final answer
    x = 7,126.09

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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.