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Finding the Fourth Proportional to 8,702.74, 12,009.54 and 5,165.92

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Solution

The fourth proportional to 8,702.74, 12,009.54 and 5,165.92 is: 7,128.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,702.74 : 12,009.54 = 5,165.92 : x
  2. Step 2: Convert to fraction form
    8,702.74/12,009.54 = 5,165.92/x
  3. Step 3: Cross multiply
    8,702.74x = 12,009.54 × 5,165.92
  4. Step 4: Simplify right side
    8,702.74x = 62,040,322.88
  5. Step 5: Solve for x
    x = 62,040,322.88/8,702.74
  6. Step 6: Final answer
    x = 7,128.83

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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.