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Finding the Fourth Proportional to 7,504.56, 11,259.90 and 3,121.20

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Solution

The fourth proportional to 7,504.56, 11,259.90 and 3,121.20 is: 4,683.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,504.56 : 11,259.90 = 3,121.20 : x
  2. Step 2: Convert to fraction form
    7,504.56/11,259.90 = 3,121.20/x
  3. Step 3: Cross multiply
    7,504.56x = 11,259.90 × 3,121.20
  4. Step 4: Simplify right side
    7,504.56x = 35,144,399.88
  5. Step 5: Solve for x
    x = 35,144,399.88/7,504.56
  6. Step 6: Final answer
    x = 4,683.07

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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.