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Finding the Fourth Proportional to 8,656.60, 12,976.68 and 2,809.12

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Solution

The fourth proportional to 8,656.60, 12,976.68 and 2,809.12 is: 4,211.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,656.60 : 12,976.68 = 2,809.12 : x
  2. Step 2: Convert to fraction form
    8,656.60/12,976.68 = 2,809.12/x
  3. Step 3: Cross multiply
    8,656.60x = 12,976.68 × 2,809.12
  4. Step 4: Simplify right side
    8,656.60x = 36,453,051.32
  5. Step 5: Solve for x
    x = 36,453,051.32/8,656.60
  6. Step 6: Final answer
    x = 4,211.01

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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.