Home / 6,623-9,139.40-3,969.90

Finding the Fourth Proportional to 6,623, 9,139.40 and 3,969.90

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Solution

The fourth proportional to 6,623, 9,139.40 and 3,969.90 is: 5,478.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,623 : 9,139.40 = 3,969.90 : x
  2. Step 2: Convert to fraction form
    6,623/9,139.40 = 3,969.90/x
  3. Step 3: Cross multiply
    6,623x = 9,139.40 × 3,969.90
  4. Step 4: Simplify right side
    6,623x = 36,282,504.06
  5. Step 5: Solve for x
    x = 36,282,504.06/6,623
  6. Step 6: Final answer
    x = 5,478.26

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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.