Home / 2,821.47-4,223.35-1,938.81

Finding the Fourth Proportional to 2,821.47, 4,223.35 and 1,938.81

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Solution

The fourth proportional to 2,821.47, 4,223.35 and 1,938.81 is: 2,902.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,821.47 : 4,223.35 = 1,938.81 : x
  2. Step 2: Convert to fraction form
    2,821.47/4,223.35 = 1,938.81/x
  3. Step 3: Cross multiply
    2,821.47x = 4,223.35 × 1,938.81
  4. Step 4: Simplify right side
    2,821.47x = 8,188,273.21
  5. Step 5: Solve for x
    x = 8,188,273.21/2,821.47
  6. Step 6: Final answer
    x = 2,902.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.