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Finding the Fourth Proportional to 8,989.71, 13,485.70 and 3,067.72

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Solution

The fourth proportional to 8,989.71, 13,485.70 and 3,067.72 is: 4,601.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,989.71 : 13,485.70 = 3,067.72 : x
  2. Step 2: Convert to fraction form
    8,989.71/13,485.70 = 3,067.72/x
  3. Step 3: Cross multiply
    8,989.71x = 13,485.70 × 3,067.72
  4. Step 4: Simplify right side
    8,989.71x = 41,370,401.90
  5. Step 5: Solve for x
    x = 41,370,401.90/8,989.71
  6. Step 6: Final answer
    x = 4,601.97

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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.