Home / 7,021.79-9,690.07-3,877.98

Finding the Fourth Proportional to 7,021.79, 9,690.07 and 3,877.98

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Solution

The fourth proportional to 7,021.79, 9,690.07 and 3,877.98 is: 5,351.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,021.79 : 9,690.07 = 3,877.98 : x
  2. Step 2: Convert to fraction form
    7,021.79/9,690.07 = 3,877.98/x
  3. Step 3: Cross multiply
    7,021.79x = 9,690.07 × 3,877.98
  4. Step 4: Simplify right side
    7,021.79x = 37,577,897.66
  5. Step 5: Solve for x
    x = 37,577,897.66/7,021.79
  6. Step 6: Final answer
    x = 5,351.61

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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.