Home / 3,128.93-4,317.96-1,871.40

Finding the Fourth Proportional to 3,128.93, 4,317.96 and 1,871.40

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Solution

The fourth proportional to 3,128.93, 4,317.96 and 1,871.40 is: 2,582.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.93 : 4,317.96 = 1,871.40 : x
  2. Step 2: Convert to fraction form
    3,128.93/4,317.96 = 1,871.40/x
  3. Step 3: Cross multiply
    3,128.93x = 4,317.96 × 1,871.40
  4. Step 4: Simplify right side
    3,128.93x = 8,080,643.03
  5. Step 5: Solve for x
    x = 8,080,643.03/3,128.93
  6. Step 6: Final answer
    x = 2,582.56

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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.