Home / 2,690.77-3,712.86-1,511.62

Finding the Fourth Proportional to 2,690.77, 3,712.86 and 1,511.62

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Solution

The fourth proportional to 2,690.77, 3,712.86 and 1,511.62 is: 2,085.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,690.77 : 3,712.86 = 1,511.62 : x
  2. Step 2: Convert to fraction form
    2,690.77/3,712.86 = 1,511.62/x
  3. Step 3: Cross multiply
    2,690.77x = 3,712.86 × 1,511.62
  4. Step 4: Simplify right side
    2,690.77x = 5,612,414.87
  5. Step 5: Solve for x
    x = 5,612,414.87/2,690.77
  6. Step 6: Final answer
    x = 2,085.80

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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.