Home / 2,812.60-3,873.90-2,438.20

Finding the Fourth Proportional to 2,812.60, 3,873.90 and 2,438.20

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Solution

The fourth proportional to 2,812.60, 3,873.90 and 2,438.20 is: 3,358.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,812.60 : 3,873.90 = 2,438.20 : x
  2. Step 2: Convert to fraction form
    2,812.60/3,873.90 = 2,438.20/x
  3. Step 3: Cross multiply
    2,812.60x = 3,873.90 × 2,438.20
  4. Step 4: Simplify right side
    2,812.60x = 9,445,342.98
  5. Step 5: Solve for x
    x = 9,445,342.98/2,812.60
  6. Step 6: Final answer
    x = 3,358.22

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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.