Home / 3,851.74-5,315.67-2,905.87

Finding the Fourth Proportional to 3,851.74, 5,315.67 and 2,905.87

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Solution

The fourth proportional to 3,851.74, 5,315.67 and 2,905.87 is: 4,010.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,851.74 : 5,315.67 = 2,905.87 : x
  2. Step 2: Convert to fraction form
    3,851.74/5,315.67 = 2,905.87/x
  3. Step 3: Cross multiply
    3,851.74x = 5,315.67 × 2,905.87
  4. Step 4: Simplify right side
    3,851.74x = 15,446,645.98
  5. Step 5: Solve for x
    x = 15,446,645.98/3,851.74
  6. Step 6: Final answer
    x = 4,010.30

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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.