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Finding the Fourth Proportional to 8,328.37, 12,489.48 and 2,780.22

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Solution

The fourth proportional to 8,328.37, 12,489.48 and 2,780.22 is: 4,169.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,328.37 : 12,489.48 = 2,780.22 : x
  2. Step 2: Convert to fraction form
    8,328.37/12,489.48 = 2,780.22/x
  3. Step 3: Cross multiply
    8,328.37x = 12,489.48 × 2,780.22
  4. Step 4: Simplify right side
    8,328.37x = 34,723,545.01
  5. Step 5: Solve for x
    x = 34,723,545.01/8,328.37
  6. Step 6: Final answer
    x = 4,169.31

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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.