Home / 7,021.77-9,690.65-3,878.56

Finding the Fourth Proportional to 7,021.77, 9,690.65 and 3,878.56

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Solution

The fourth proportional to 7,021.77, 9,690.65 and 3,878.56 is: 5,352.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,021.77 : 9,690.65 = 3,878.56 : x
  2. Step 2: Convert to fraction form
    7,021.77/9,690.65 = 3,878.56/x
  3. Step 3: Cross multiply
    7,021.77x = 9,690.65 × 3,878.56
  4. Step 4: Simplify right side
    7,021.77x = 37,585,748.07
  5. Step 5: Solve for x
    x = 37,585,748.07/7,021.77
  6. Step 6: Final answer
    x = 5,352.75

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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.