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Finding the Fourth Proportional to 8,659.96, 12,985.31 and 4,489.63

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Solution

The fourth proportional to 8,659.96, 12,985.31 and 4,489.63 is: 6,732.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,659.96 : 12,985.31 = 4,489.63 : x
  2. Step 2: Convert to fraction form
    8,659.96/12,985.31 = 4,489.63/x
  3. Step 3: Cross multiply
    8,659.96x = 12,985.31 × 4,489.63
  4. Step 4: Simplify right side
    8,659.96x = 58,299,216.10
  5. Step 5: Solve for x
    x = 58,299,216.10/8,659.96
  6. Step 6: Final answer
    x = 6,732.04

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1.5x scale

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.