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Finding the Fourth Proportional to 8,986.29, 12,389.00 and 6,293.90

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Solution

The fourth proportional to 8,986.29, 12,389.00 and 6,293.90 is: 8,677.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,986.29 : 12,389.00 = 6,293.90 : x
  2. Step 2: Convert to fraction form
    8,986.29/12,389.00 = 6,293.90/x
  3. Step 3: Cross multiply
    8,986.29x = 12,389.00 × 6,293.90
  4. Step 4: Simplify right side
    8,986.29x = 77,975,033.69
  5. Step 5: Solve for x
    x = 77,975,033.69/8,986.29
  6. Step 6: Final answer
    x = 8,677.11

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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.