Home / 7,172.36-9,898.44-4,028.72

Finding the Fourth Proportional to 7,172.36, 9,898.44 and 4,028.72

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Solution

The fourth proportional to 7,172.36, 9,898.44 and 4,028.72 is: 5,559.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,172.36 : 9,898.44 = 4,028.72 : x
  2. Step 2: Convert to fraction form
    7,172.36/9,898.44 = 4,028.72/x
  3. Step 3: Cross multiply
    7,172.36x = 9,898.44 × 4,028.72
  4. Step 4: Simplify right side
    7,172.36x = 39,878,043.20
  5. Step 5: Solve for x
    x = 39,878,043.20/7,172.36
  6. Step 6: Final answer
    x = 5,559.96

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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.