Home / 7,085.80-9,778-3,941.36

Finding the Fourth Proportional to 7,085.80, 9,778 and 3,941.36

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Solution

The fourth proportional to 7,085.80, 9,778 and 3,941.36 is: 5,438.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,085.80 : 9,778 = 3,941.36 : x
  2. Step 2: Convert to fraction form
    7,085.80/9,778 = 3,941.36/x
  3. Step 3: Cross multiply
    7,085.80x = 9,778 × 3,941.36
  4. Step 4: Simplify right side
    7,085.80x = 38,538,618.08
  5. Step 5: Solve for x
    x = 38,538,618.08/7,085.80
  6. Step 6: Final answer
    x = 5,438.85

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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.