Home / 3,138.06-4,330.47-1,812.20

Finding the Fourth Proportional to 3,138.06, 4,330.47 and 1,812.20

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Solution

The fourth proportional to 3,138.06, 4,330.47 and 1,812.20 is: 2,500.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.06 : 4,330.47 = 1,812.20 : x
  2. Step 2: Convert to fraction form
    3,138.06/4,330.47 = 1,812.20/x
  3. Step 3: Cross multiply
    3,138.06x = 4,330.47 × 1,812.20
  4. Step 4: Simplify right side
    3,138.06x = 7,847,656.08
  5. Step 5: Solve for x
    x = 7,847,656.08/3,138.06
  6. Step 6: Final answer
    x = 2,500.80

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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.