Home / 8,172.21-12,256.47-3,240.51

Finding the Fourth Proportional to 8,172.21, 12,256.47 and 3,240.51

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Solution

The fourth proportional to 8,172.21, 12,256.47 and 3,240.51 is: 4,860.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,172.21 : 12,256.47 = 3,240.51 : x
  2. Step 2: Convert to fraction form
    8,172.21/12,256.47 = 3,240.51/x
  3. Step 3: Cross multiply
    8,172.21x = 12,256.47 × 3,240.51
  4. Step 4: Simplify right side
    8,172.21x = 39,717,213.60
  5. Step 5: Solve for x
    x = 39,717,213.60/8,172.21
  6. Step 6: Final answer
    x = 4,860.03

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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.