Home / 3,851.47-5,315.19-2,172.94

Finding the Fourth Proportional to 3,851.47, 5,315.19 and 2,172.94

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Solution

The fourth proportional to 3,851.47, 5,315.19 and 2,172.94 is: 2,998.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,851.47 : 5,315.19 = 2,172.94 : x
  2. Step 2: Convert to fraction form
    3,851.47/5,315.19 = 2,172.94/x
  3. Step 3: Cross multiply
    3,851.47x = 5,315.19 × 2,172.94
  4. Step 4: Simplify right side
    3,851.47x = 11,549,588.96
  5. Step 5: Solve for x
    x = 11,549,588.96/3,851.47
  6. Step 6: Final answer
    x = 2,998.75

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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.