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Finding the Fourth Proportional to 7,919.49, 11,879.25 and 2,653.53

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Solution

The fourth proportional to 7,919.49, 11,879.25 and 2,653.53 is: 3,980.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,919.49 : 11,879.25 = 2,653.53 : x
  2. Step 2: Convert to fraction form
    7,919.49/11,879.25 = 2,653.53/x
  3. Step 3: Cross multiply
    7,919.49x = 11,879.25 × 2,653.53
  4. Step 4: Simplify right side
    7,919.49x = 31,521,946.25
  5. Step 5: Solve for x
    x = 31,521,946.25/7,919.49
  6. Step 6: Final answer
    x = 3,980.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.