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Finding the Fourth Proportional to 8,611, 11,880.14 and 5,628.56

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Solution

The fourth proportional to 8,611, 11,880.14 and 5,628.56 is: 7,765.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,611 : 11,880.14 = 5,628.56 : x
  2. Step 2: Convert to fraction form
    8,611/11,880.14 = 5,628.56/x
  3. Step 3: Cross multiply
    8,611x = 11,880.14 × 5,628.56
  4. Step 4: Simplify right side
    8,611x = 66,868,080.80
  5. Step 5: Solve for x
    x = 66,868,080.80/8,611
  6. Step 6: Final answer
    x = 7,765.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.