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Finding the Fourth Proportional to 8,986.91, 13,486.44 and 3,143.57

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Solution

The fourth proportional to 8,986.91, 13,486.44 and 3,143.57 is: 4,717.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,986.91 : 13,486.44 = 3,143.57 : x
  2. Step 2: Convert to fraction form
    8,986.91/13,486.44 = 3,143.57/x
  3. Step 3: Cross multiply
    8,986.91x = 13,486.44 × 3,143.57
  4. Step 4: Simplify right side
    8,986.91x = 42,395,568.19
  5. Step 5: Solve for x
    x = 42,395,568.19/8,986.91
  6. Step 6: Final answer
    x = 4,717.48

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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.