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Finding the Fourth Proportional to 8,809, 13,229.90 and 8,456.64

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Solution

The fourth proportional to 8,809, 13,229.90 and 8,456.64 is: 12,700.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,809 : 13,229.90 = 8,456.64 : x
  2. Step 2: Convert to fraction form
    8,809/13,229.90 = 8,456.64/x
  3. Step 3: Cross multiply
    8,809x = 13,229.90 × 8,456.64
  4. Step 4: Simplify right side
    8,809x = 111,880,501.54
  5. Step 5: Solve for x
    x = 111,880,501.54/8,809
  6. Step 6: Final answer
    x = 12,700.70

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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.