Home / 7,172.50-9,898.06-4,028.70

Finding the Fourth Proportional to 7,172.50, 9,898.06 and 4,028.70

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Solution

The fourth proportional to 7,172.50, 9,898.06 and 4,028.70 is: 5,559.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,172.50 : 9,898.06 = 4,028.70 : x
  2. Step 2: Convert to fraction form
    7,172.50/9,898.06 = 4,028.70/x
  3. Step 3: Cross multiply
    7,172.50x = 9,898.06 × 4,028.70
  4. Step 4: Simplify right side
    7,172.50x = 39,876,314.32
  5. Step 5: Solve for x
    x = 39,876,314.32/7,172.50
  6. Step 6: Final answer
    x = 5,559.61

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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.