Home / 7,021.88-9,690.20-3,878.07

Finding the Fourth Proportional to 7,021.88, 9,690.20 and 3,878.07

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Solution

The fourth proportional to 7,021.88, 9,690.20 and 3,878.07 is: 5,351.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,021.88 : 9,690.20 = 3,878.07 : x
  2. Step 2: Convert to fraction form
    7,021.88/9,690.20 = 3,878.07/x
  3. Step 3: Cross multiply
    7,021.88x = 9,690.20 × 3,878.07
  4. Step 4: Simplify right side
    7,021.88x = 37,579,254.52
  5. Step 5: Solve for x
    x = 37,579,254.52/7,021.88
  6. Step 6: Final answer
    x = 5,351.74

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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.