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Finding the Fourth Proportional to 8,999.75, 12,418.86 and 5,813.18

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Solution

The fourth proportional to 8,999.75, 12,418.86 and 5,813.18 is: 8,021.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,999.75 : 12,418.86 = 5,813.18 : x
  2. Step 2: Convert to fraction form
    8,999.75/12,418.86 = 5,813.18/x
  3. Step 3: Cross multiply
    8,999.75x = 12,418.86 × 5,813.18
  4. Step 4: Simplify right side
    8,999.75x = 72,193,006.48
  5. Step 5: Solve for x
    x = 72,193,006.48/8,999.75
  6. Step 6: Final answer
    x = 8,021.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.