Home / 3,912.09-5,397.60-2,420.07

Finding the Fourth Proportional to 3,912.09, 5,397.60 and 2,420.07

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Solution

The fourth proportional to 3,912.09, 5,397.60 and 2,420.07 is: 3,339.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,912.09 : 5,397.60 = 2,420.07 : x
  2. Step 2: Convert to fraction form
    3,912.09/5,397.60 = 2,420.07/x
  3. Step 3: Cross multiply
    3,912.09x = 5,397.60 × 2,420.07
  4. Step 4: Simplify right side
    3,912.09x = 13,062,569.83
  5. Step 5: Solve for x
    x = 13,062,569.83/3,912.09
  6. Step 6: Final answer
    x = 3,339.03

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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.