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Finding the Fourth Proportional to 8,636.13, 12,935.39 and 5,294.27

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Solution

The fourth proportional to 8,636.13, 12,935.39 and 5,294.27 is: 7,929.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,636.13 : 12,935.39 = 5,294.27 : x
  2. Step 2: Convert to fraction form
    8,636.13/12,935.39 = 5,294.27/x
  3. Step 3: Cross multiply
    8,636.13x = 12,935.39 × 5,294.27
  4. Step 4: Simplify right side
    8,636.13x = 68,483,356.07
  5. Step 5: Solve for x
    x = 68,483,356.07/8,636.13
  6. Step 6: Final answer
    x = 7,929.87

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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.