Home / 2,818.88-3,890.68-1,876.32

Finding the Fourth Proportional to 2,818.88, 3,890.68 and 1,876.32

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Solution

The fourth proportional to 2,818.88, 3,890.68 and 1,876.32 is: 2,589.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,818.88 : 3,890.68 = 1,876.32 : x
  2. Step 2: Convert to fraction form
    2,818.88/3,890.68 = 1,876.32/x
  3. Step 3: Cross multiply
    2,818.88x = 3,890.68 × 1,876.32
  4. Step 4: Simplify right side
    2,818.88x = 7,300,160.70
  5. Step 5: Solve for x
    x = 7,300,160.70/2,818.88
  6. Step 6: Final answer
    x = 2,589.74

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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.