Home / 2,762.12-3,811.50-1,520.12

Finding the Fourth Proportional to 2,762.12, 3,811.50 and 1,520.12

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Solution

The fourth proportional to 2,762.12, 3,811.50 and 1,520.12 is: 2,097.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,762.12 : 3,811.50 = 1,520.12 : x
  2. Step 2: Convert to fraction form
    2,762.12/3,811.50 = 1,520.12/x
  3. Step 3: Cross multiply
    2,762.12x = 3,811.50 × 1,520.12
  4. Step 4: Simplify right side
    2,762.12x = 5,793,937.38
  5. Step 5: Solve for x
    x = 5,793,937.38/2,762.12
  6. Step 6: Final answer
    x = 2,097.64

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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.