Home / 5,172.30-7,137.90-2,814.60

Finding the Fourth Proportional to 5,172.30, 7,137.90 and 2,814.60

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Solution

The fourth proportional to 5,172.30, 7,137.90 and 2,814.60 is: 3,884.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,172.30 : 7,137.90 = 2,814.60 : x
  2. Step 2: Convert to fraction form
    5,172.30/7,137.90 = 2,814.60/x
  3. Step 3: Cross multiply
    5,172.30x = 7,137.90 × 2,814.60
  4. Step 4: Simplify right side
    5,172.30x = 20,090,333.34
  5. Step 5: Solve for x
    x = 20,090,333.34/5,172.30
  6. Step 6: Final answer
    x = 3,884.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.