Home / 2,886.21-3,985.13-1,891.12

Finding the Fourth Proportional to 2,886.21, 3,985.13 and 1,891.12

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Solution

The fourth proportional to 2,886.21, 3,985.13 and 1,891.12 is: 2,611.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,886.21 : 3,985.13 = 1,891.12 : x
  2. Step 2: Convert to fraction form
    2,886.21/3,985.13 = 1,891.12/x
  3. Step 3: Cross multiply
    2,886.21x = 3,985.13 × 1,891.12
  4. Step 4: Simplify right side
    2,886.21x = 7,536,359.05
  5. Step 5: Solve for x
    x = 7,536,359.05/2,886.21
  6. Step 6: Final answer
    x = 2,611.16

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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.