Home / 8,106.80-12,160.60-4,218.80

Finding the Fourth Proportional to 8,106.80, 12,160.60 and 4,218.80

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Solution

The fourth proportional to 8,106.80, 12,160.60 and 4,218.80 is: 6,328.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,106.80 : 12,160.60 = 4,218.80 : x
  2. Step 2: Convert to fraction form
    8,106.80/12,160.60 = 4,218.80/x
  3. Step 3: Cross multiply
    8,106.80x = 12,160.60 × 4,218.80
  4. Step 4: Simplify right side
    8,106.80x = 51,303,139.28
  5. Step 5: Solve for x
    x = 51,303,139.28/8,106.80
  6. Step 6: Final answer
    x = 6,328.41

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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.