Home / 1,921.74-2,651.56-1,135.36

Finding the Fourth Proportional to 1,921.74, 2,651.56 and 1,135.36

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Solution

The fourth proportional to 1,921.74, 2,651.56 and 1,135.36 is: 1,566.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.74 : 2,651.56 = 1,135.36 : x
  2. Step 2: Convert to fraction form
    1,921.74/2,651.56 = 1,135.36/x
  3. Step 3: Cross multiply
    1,921.74x = 2,651.56 × 1,135.36
  4. Step 4: Simplify right side
    1,921.74x = 3,010,475.16
  5. Step 5: Solve for x
    x = 3,010,475.16/1,921.74
  6. Step 6: Final answer
    x = 1,566.54

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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.