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Finding the Fourth Proportional to 8,636.13, 12,968.73 and 5,639.18

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Solution

The fourth proportional to 8,636.13, 12,968.73 and 5,639.18 is: 8,468.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,636.13 : 12,968.73 = 5,639.18 : x
  2. Step 2: Convert to fraction form
    8,636.13/12,968.73 = 5,639.18/x
  3. Step 3: Cross multiply
    8,636.13x = 12,968.73 × 5,639.18
  4. Step 4: Simplify right side
    8,636.13x = 73,132,938.00
  5. Step 5: Solve for x
    x = 73,132,938.00/8,636.13
  6. Step 6: Final answer
    x = 8,468.25

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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.