Home / 7,077.80-9,767.96-3,935

Finding the Fourth Proportional to 7,077.80, 9,767.96 and 3,935

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Solution

The fourth proportional to 7,077.80, 9,767.96 and 3,935 is: 5,430.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,077.80 : 9,767.96 = 3,935 : x
  2. Step 2: Convert to fraction form
    7,077.80/9,767.96 = 3,935/x
  3. Step 3: Cross multiply
    7,077.80x = 9,767.96 × 3,935
  4. Step 4: Simplify right side
    7,077.80x = 38,436,922.60
  5. Step 5: Solve for x
    x = 38,436,922.60/7,077.80
  6. Step 6: Final answer
    x = 5,430.63

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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.