Home / 7,921.80-11,883.16-2,657.51

Finding the Fourth Proportional to 7,921.80, 11,883.16 and 2,657.51

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Solution

The fourth proportional to 7,921.80, 11,883.16 and 2,657.51 is: 3,986.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,921.80 : 11,883.16 = 2,657.51 : x
  2. Step 2: Convert to fraction form
    7,921.80/11,883.16 = 2,657.51/x
  3. Step 3: Cross multiply
    7,921.80x = 11,883.16 × 2,657.51
  4. Step 4: Simplify right side
    7,921.80x = 31,579,590.05
  5. Step 5: Solve for x
    x = 31,579,590.05/7,921.80
  6. Step 6: Final answer
    x = 3,986.42

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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.