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Finding the Fourth Proportional to 8,657.84, 12,989.78 and 2,735.64

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Solution

The fourth proportional to 8,657.84, 12,989.78 and 2,735.64 is: 4,104.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,657.84 : 12,989.78 = 2,735.64 : x
  2. Step 2: Convert to fraction form
    8,657.84/12,989.78 = 2,735.64/x
  3. Step 3: Cross multiply
    8,657.84x = 12,989.78 × 2,735.64
  4. Step 4: Simplify right side
    8,657.84x = 35,535,361.76
  5. Step 5: Solve for x
    x = 35,535,361.76/8,657.84
  6. Step 6: Final answer
    x = 4,104.41

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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.