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Finding the Fourth Proportional to 8,645.85, 12,969.95 and 3,100.73

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Solution

The fourth proportional to 8,645.85, 12,969.95 and 3,100.73 is: 4,651.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,645.85 : 12,969.95 = 3,100.73 : x
  2. Step 2: Convert to fraction form
    8,645.85/12,969.95 = 3,100.73/x
  3. Step 3: Cross multiply
    8,645.85x = 12,969.95 × 3,100.73
  4. Step 4: Simplify right side
    8,645.85x = 40,216,232.71
  5. Step 5: Solve for x
    x = 40,216,232.71/8,645.85
  6. Step 6: Final answer
    x = 4,651.51

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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.