Home / 7,121.79-9,828.14-4,137.75

Finding the Fourth Proportional to 7,121.79, 9,828.14 and 4,137.75

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Solution

The fourth proportional to 7,121.79, 9,828.14 and 4,137.75 is: 5,710.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121.79 : 9,828.14 = 4,137.75 : x
  2. Step 2: Convert to fraction form
    7,121.79/9,828.14 = 4,137.75/x
  3. Step 3: Cross multiply
    7,121.79x = 9,828.14 × 4,137.75
  4. Step 4: Simplify right side
    7,121.79x = 40,666,365.60
  5. Step 5: Solve for x
    x = 40,666,365.60/7,121.79
  6. Step 6: Final answer
    x = 5,710.13

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