Home / 3,123.49-4,304.78-2,765.11

Finding the Fourth Proportional to 3,123.49, 4,304.78 and 2,765.11

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Solution

The fourth proportional to 3,123.49, 4,304.78 and 2,765.11 is: 3,810.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,123.49 : 4,304.78 = 2,765.11 : x
  2. Step 2: Convert to fraction form
    3,123.49/4,304.78 = 2,765.11/x
  3. Step 3: Cross multiply
    3,123.49x = 4,304.78 × 2,765.11
  4. Step 4: Simplify right side
    3,123.49x = 11,903,176.40
  5. Step 5: Solve for x
    x = 11,903,176.40/3,123.49
  6. Step 6: Final answer
    x = 3,810.86

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1.5x scale

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.