Home / 3,138.76-4,330.80-2,020.08

Finding the Fourth Proportional to 3,138.76, 4,330.80 and 2,020.08

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Solution

The fourth proportional to 3,138.76, 4,330.80 and 2,020.08 is: 2,787.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.76 : 4,330.80 = 2,020.08 : x
  2. Step 2: Convert to fraction form
    3,138.76/4,330.80 = 2,020.08/x
  3. Step 3: Cross multiply
    3,138.76x = 4,330.80 × 2,020.08
  4. Step 4: Simplify right side
    3,138.76x = 8,748,562.46
  5. Step 5: Solve for x
    x = 8,748,562.46/3,138.76
  6. Step 6: Final answer
    x = 2,787.27

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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.