Home / 4,273.20-6,409.80-3,121.20

Finding the Fourth Proportional to 4,273.20, 6,409.80 and 3,121.20

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Solution

The fourth proportional to 4,273.20, 6,409.80 and 3,121.20 is: 4,681.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,273.20 : 6,409.80 = 3,121.20 : x
  2. Step 2: Convert to fraction form
    4,273.20/6,409.80 = 3,121.20/x
  3. Step 3: Cross multiply
    4,273.20x = 6,409.80 × 3,121.20
  4. Step 4: Simplify right side
    4,273.20x = 20,006,267.76
  5. Step 5: Solve for x
    x = 20,006,267.76/4,273.20
  6. Step 6: Final answer
    x = 4,681.80

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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.