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Finding the Fourth Proportional to 4,986.06, 6,879.24 and 2,889.78

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Solution

The fourth proportional to 4,986.06, 6,879.24 and 2,889.78 is: 3,987.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,986.06 : 6,879.24 = 2,889.78 : x
  2. Step 2: Convert to fraction form
    4,986.06/6,879.24 = 2,889.78/x
  3. Step 3: Cross multiply
    4,986.06x = 6,879.24 × 2,889.78
  4. Step 4: Simplify right side
    4,986.06x = 19,879,490.17
  5. Step 5: Solve for x
    x = 19,879,490.17/4,986.06
  6. Step 6: Final answer
    x = 3,987.01

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1.5x scale

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.