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Finding the Fourth Proportional to 8,618.85, 11,893.86 and 4,790.40

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Solution

The fourth proportional to 8,618.85, 11,893.86 and 4,790.40 is: 6,610.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,618.85 : 11,893.86 = 4,790.40 : x
  2. Step 2: Convert to fraction form
    8,618.85/11,893.86 = 4,790.40/x
  3. Step 3: Cross multiply
    8,618.85x = 11,893.86 × 4,790.40
  4. Step 4: Simplify right side
    8,618.85x = 56,976,346.94
  5. Step 5: Solve for x
    x = 56,976,346.94/8,618.85
  6. Step 6: Final answer
    x = 6,610.67

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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.