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Finding the Fourth Proportional to 8,169.90, 12,269.70 and 4,889.40

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Solution

The fourth proportional to 8,169.90, 12,269.70 and 4,889.40 is: 7,342.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,169.90 : 12,269.70 = 4,889.40 : x
  2. Step 2: Convert to fraction form
    8,169.90/12,269.70 = 4,889.40/x
  3. Step 3: Cross multiply
    8,169.90x = 12,269.70 × 4,889.40
  4. Step 4: Simplify right side
    8,169.90x = 59,991,471.18
  5. Step 5: Solve for x
    x = 59,991,471.18/8,169.90
  6. Step 6: Final answer
    x = 7,342.99

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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.