Home / 7,991.77-11,028.70-4,455.21

Finding the Fourth Proportional to 7,991.77, 11,028.70 and 4,455.21

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Solution

The fourth proportional to 7,991.77, 11,028.70 and 4,455.21 is: 6,148.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,991.77 : 11,028.70 = 4,455.21 : x
  2. Step 2: Convert to fraction form
    7,991.77/11,028.70 = 4,455.21/x
  3. Step 3: Cross multiply
    7,991.77x = 11,028.70 × 4,455.21
  4. Step 4: Simplify right side
    7,991.77x = 49,135,174.53
  5. Step 5: Solve for x
    x = 49,135,174.53/7,991.77
  6. Step 6: Final answer
    x = 6,148.22

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1.5x scale

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.