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Finding the Fourth Proportional to 5,321.37, 7,975.20 and 4,989.22

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Solution

The fourth proportional to 5,321.37, 7,975.20 and 4,989.22 is: 7,477.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,321.37 : 7,975.20 = 4,989.22 : x
  2. Step 2: Convert to fraction form
    5,321.37/7,975.20 = 4,989.22/x
  3. Step 3: Cross multiply
    5,321.37x = 7,975.20 × 4,989.22
  4. Step 4: Simplify right side
    5,321.37x = 39,790,026.12
  5. Step 5: Solve for x
    x = 39,790,026.12/5,321.37
  6. Step 6: Final answer
    x = 7,477.40

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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.