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Finding the Fourth Proportional to 8,609.84, 12,913.26 and 3,928.76

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Solution

The fourth proportional to 8,609.84, 12,913.26 and 3,928.76 is: 5,892.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,609.84 : 12,913.26 = 3,928.76 : x
  2. Step 2: Convert to fraction form
    8,609.84/12,913.26 = 3,928.76/x
  3. Step 3: Cross multiply
    8,609.84x = 12,913.26 × 3,928.76
  4. Step 4: Simplify right side
    8,609.84x = 50,733,099.36
  5. Step 5: Solve for x
    x = 50,733,099.36/8,609.84
  6. Step 6: Final answer
    x = 5,892.46

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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.