Home / 1,986.13-2,739.65-1,313.93

Finding the Fourth Proportional to 1,986.13, 2,739.65 and 1,313.93

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Solution

The fourth proportional to 1,986.13, 2,739.65 and 1,313.93 is: 1,812.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986.13 : 2,739.65 = 1,313.93 : x
  2. Step 2: Convert to fraction form
    1,986.13/2,739.65 = 1,313.93/x
  3. Step 3: Cross multiply
    1,986.13x = 2,739.65 × 1,313.93
  4. Step 4: Simplify right side
    1,986.13x = 3,599,708.32
  5. Step 5: Solve for x
    x = 3,599,708.32/1,986.13
  6. Step 6: Final answer
    x = 1,812.42

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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.