Home / 3,121.20-4,681.80-2,572.02

Finding the Fourth Proportional to 3,121.20, 4,681.80 and 2,572.02

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Solution

The fourth proportional to 3,121.20, 4,681.80 and 2,572.02 is: 3,858.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.20 : 4,681.80 = 2,572.02 : x
  2. Step 2: Convert to fraction form
    3,121.20/4,681.80 = 2,572.02/x
  3. Step 3: Cross multiply
    3,121.20x = 4,681.80 × 2,572.02
  4. Step 4: Simplify right side
    3,121.20x = 12,041,683.24
  5. Step 5: Solve for x
    x = 12,041,683.24/3,121.20
  6. Step 6: Final answer
    x = 3,858.03

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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.