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Finding the Fourth Proportional to 8,998.60, 12,419 and 5,643.96

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Solution

The fourth proportional to 8,998.60, 12,419 and 5,643.96 is: 7,789.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,998.60 : 12,419 = 5,643.96 : x
  2. Step 2: Convert to fraction form
    8,998.60/12,419 = 5,643.96/x
  3. Step 3: Cross multiply
    8,998.60x = 12,419 × 5,643.96
  4. Step 4: Simplify right side
    8,998.60x = 70,092,339.24
  5. Step 5: Solve for x
    x = 70,092,339.24/8,998.60
  6. Step 6: Final answer
    x = 7,789.25

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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.