Home / 7,172.74-9,898.35-3,986.02

Finding the Fourth Proportional to 7,172.74, 9,898.35 and 3,986.02

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Solution

The fourth proportional to 7,172.74, 9,898.35 and 3,986.02 is: 5,500.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,172.74 : 9,898.35 = 3,986.02 : x
  2. Step 2: Convert to fraction form
    7,172.74/9,898.35 = 3,986.02/x
  3. Step 3: Cross multiply
    7,172.74x = 9,898.35 × 3,986.02
  4. Step 4: Simplify right side
    7,172.74x = 39,454,996.32
  5. Step 5: Solve for x
    x = 39,454,996.32/7,172.74
  6. Step 6: Final answer
    x = 5,500.69

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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.