Home / 5,277-7,916.40-1,990.56

Finding the Fourth Proportional to 5,277, 7,916.40 and 1,990.56

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Solution

The fourth proportional to 5,277, 7,916.40 and 1,990.56 is: 2,986.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,277 : 7,916.40 = 1,990.56 : x
  2. Step 2: Convert to fraction form
    5,277/7,916.40 = 1,990.56/x
  3. Step 3: Cross multiply
    5,277x = 7,916.40 × 1,990.56
  4. Step 4: Simplify right side
    5,277x = 15,758,069.18
  5. Step 5: Solve for x
    x = 15,758,069.18/5,277
  6. Step 6: Final answer
    x = 2,986.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.