Home / 2,918.80-4,027.32-2,818.78

Finding the Fourth Proportional to 2,918.80, 4,027.32 and 2,818.78

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Solution

The fourth proportional to 2,918.80, 4,027.32 and 2,818.78 is: 3,889.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,918.80 : 4,027.32 = 2,818.78 : x
  2. Step 2: Convert to fraction form
    2,918.80/4,027.32 = 2,818.78/x
  3. Step 3: Cross multiply
    2,918.80x = 4,027.32 × 2,818.78
  4. Step 4: Simplify right side
    2,918.80x = 11,352,129.07
  5. Step 5: Solve for x
    x = 11,352,129.07/2,918.80
  6. Step 6: Final answer
    x = 3,889.31

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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.