Home / 5,121.36-7,686.86-2,657.93

Finding the Fourth Proportional to 5,121.36, 7,686.86 and 2,657.93

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Solution

The fourth proportional to 5,121.36, 7,686.86 and 2,657.93 is: 3,989.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,121.36 : 7,686.86 = 2,657.93 : x
  2. Step 2: Convert to fraction form
    5,121.36/7,686.86 = 2,657.93/x
  3. Step 3: Cross multiply
    5,121.36x = 7,686.86 × 2,657.93
  4. Step 4: Simplify right side
    5,121.36x = 20,431,084.08
  5. Step 5: Solve for x
    x = 20,431,084.08/5,121.36
  6. Step 6: Final answer
    x = 3,989.39

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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.