Home / 5,479.80-7,558.98-3,121.50

Finding the Fourth Proportional to 5,479.80, 7,558.98 and 3,121.50

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Solution

The fourth proportional to 5,479.80, 7,558.98 and 3,121.50 is: 4,305.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,479.80 : 7,558.98 = 3,121.50 : x
  2. Step 2: Convert to fraction form
    5,479.80/7,558.98 = 3,121.50/x
  3. Step 3: Cross multiply
    5,479.80x = 7,558.98 × 3,121.50
  4. Step 4: Simplify right side
    5,479.80x = 23,595,356.07
  5. Step 5: Solve for x
    x = 23,595,356.07/5,479.80
  6. Step 6: Final answer
    x = 4,305.88

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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.