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Finding the Fourth Proportional to 8,653.00, 12,980.53 and 3,105.88

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Solution

The fourth proportional to 8,653.00, 12,980.53 and 3,105.88 is: 4,659.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,653.00 : 12,980.53 = 3,105.88 : x
  2. Step 2: Convert to fraction form
    8,653.00/12,980.53 = 3,105.88/x
  3. Step 3: Cross multiply
    8,653.00x = 12,980.53 × 3,105.88
  4. Step 4: Simplify right side
    8,653.00x = 40,315,985.97
  5. Step 5: Solve for x
    x = 40,315,985.97/8,653.00
  6. Step 6: Final answer
    x = 4,659.19

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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.