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Finding the Fourth Proportional to 8,605.15, 12,909.07 and 3,674.81

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Solution

The fourth proportional to 8,605.15, 12,909.07 and 3,674.81 is: 5,512.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,605.15 : 12,909.07 = 3,674.81 : x
  2. Step 2: Convert to fraction form
    8,605.15/12,909.07 = 3,674.81/x
  3. Step 3: Cross multiply
    8,605.15x = 12,909.07 × 3,674.81
  4. Step 4: Simplify right side
    8,605.15x = 47,438,416.39
  5. Step 5: Solve for x
    x = 47,438,416.39/8,605.15
  6. Step 6: Final answer
    x = 5,512.80

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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.