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Finding the Fourth Proportional to 8,609.79, 12,912.97 and 2,368.19

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Solution

The fourth proportional to 8,609.79, 12,912.97 and 2,368.19 is: 3,551.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,609.79 : 12,912.97 = 2,368.19 : x
  2. Step 2: Convert to fraction form
    8,609.79/12,912.97 = 2,368.19/x
  3. Step 3: Cross multiply
    8,609.79x = 12,912.97 × 2,368.19
  4. Step 4: Simplify right side
    8,609.79x = 30,580,366.42
  5. Step 5: Solve for x
    x = 30,580,366.42/8,609.79
  6. Step 6: Final answer
    x = 3,551.81

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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.