Home / 2,920.55-4,028.54-2,081.51

Finding the Fourth Proportional to 2,920.55, 4,028.54 and 2,081.51

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Solution

The fourth proportional to 2,920.55, 4,028.54 and 2,081.51 is: 2,871.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,920.55 : 4,028.54 = 2,081.51 : x
  2. Step 2: Convert to fraction form
    2,920.55/4,028.54 = 2,081.51/x
  3. Step 3: Cross multiply
    2,920.55x = 4,028.54 × 2,081.51
  4. Step 4: Simplify right side
    2,920.55x = 8,385,461.57
  5. Step 5: Solve for x
    x = 8,385,461.57/2,920.55
  6. Step 6: Final answer
    x = 2,871.20

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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.