Home / 2,811.87-3,880.32-1,693.74

Finding the Fourth Proportional to 2,811.87, 3,880.32 and 1,693.74

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Solution

The fourth proportional to 2,811.87, 3,880.32 and 1,693.74 is: 2,337.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.87 : 3,880.32 = 1,693.74 : x
  2. Step 2: Convert to fraction form
    2,811.87/3,880.32 = 1,693.74/x
  3. Step 3: Cross multiply
    2,811.87x = 3,880.32 × 1,693.74
  4. Step 4: Simplify right side
    2,811.87x = 6,572,253.20
  5. Step 5: Solve for x
    x = 6,572,253.20/2,811.87
  6. Step 6: Final answer
    x = 2,337.32

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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.