Home / 2,811.32-3,880.90-1,817.08

Finding the Fourth Proportional to 2,811.32, 3,880.90 and 1,817.08

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Solution

The fourth proportional to 2,811.32, 3,880.90 and 1,817.08 is: 2,508.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.32 : 3,880.90 = 1,817.08 : x
  2. Step 2: Convert to fraction form
    2,811.32/3,880.90 = 1,817.08/x
  3. Step 3: Cross multiply
    2,811.32x = 3,880.90 × 1,817.08
  4. Step 4: Simplify right side
    2,811.32x = 7,051,909.95
  5. Step 5: Solve for x
    x = 7,051,909.95/2,811.32
  6. Step 6: Final answer
    x = 2,508.39

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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.