Home / 3,147.60-4,343.35-1,821.05

Finding the Fourth Proportional to 3,147.60, 4,343.35 and 1,821.05

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Solution

The fourth proportional to 3,147.60, 4,343.35 and 1,821.05 is: 2,512.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,147.60 : 4,343.35 = 1,821.05 : x
  2. Step 2: Convert to fraction form
    3,147.60/4,343.35 = 1,821.05/x
  3. Step 3: Cross multiply
    3,147.60x = 4,343.35 × 1,821.05
  4. Step 4: Simplify right side
    3,147.60x = 7,909,431.25
  5. Step 5: Solve for x
    x = 7,909,431.25/3,147.60
  6. Step 6: Final answer
    x = 2,512.85

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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.