Home / 3,851.88-5,315.91-2,173.20

Finding the Fourth Proportional to 3,851.88, 5,315.91 and 2,173.20

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Solution

The fourth proportional to 3,851.88, 5,315.91 and 2,173.20 is: 2,999.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,851.88 : 5,315.91 = 2,173.20 : x
  2. Step 2: Convert to fraction form
    3,851.88/5,315.91 = 2,173.20/x
  3. Step 3: Cross multiply
    3,851.88x = 5,315.91 × 2,173.20
  4. Step 4: Simplify right side
    3,851.88x = 11,552,535.61
  5. Step 5: Solve for x
    x = 11,552,535.61/3,851.88
  6. Step 6: Final answer
    x = 2,999.19

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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.