Home / 8,611.24-12,918.78-2,768.68

Finding the Fourth Proportional to 8,611.24, 12,918.78 and 2,768.68

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Solution

The fourth proportional to 8,611.24, 12,918.78 and 2,768.68 is: 4,153.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,611.24 : 12,918.78 = 2,768.68 : x
  2. Step 2: Convert to fraction form
    8,611.24/12,918.78 = 2,768.68/x
  3. Step 3: Cross multiply
    8,611.24x = 12,918.78 × 2,768.68
  4. Step 4: Simplify right side
    8,611.24x = 35,767,967.81
  5. Step 5: Solve for x
    x = 35,767,967.81/8,611.24
  6. Step 6: Final answer
    x = 4,153.64

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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.