Home / 2,815.71-3,886.77-2,520.47

Finding the Fourth Proportional to 2,815.71, 3,886.77 and 2,520.47

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Solution

The fourth proportional to 2,815.71, 3,886.77 and 2,520.47 is: 3,479.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815.71 : 3,886.77 = 2,520.47 : x
  2. Step 2: Convert to fraction form
    2,815.71/3,886.77 = 2,520.47/x
  3. Step 3: Cross multiply
    2,815.71x = 3,886.77 × 2,520.47
  4. Step 4: Simplify right side
    2,815.71x = 9,796,467.75
  5. Step 5: Solve for x
    x = 9,796,467.75/2,815.71
  6. Step 6: Final answer
    x = 3,479.22

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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.