Home / 2,889.42-3,987.39-1,563.12

Finding the Fourth Proportional to 2,889.42, 3,987.39 and 1,563.12

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Solution

The fourth proportional to 2,889.42, 3,987.39 and 1,563.12 is: 2,157.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,889.42 : 3,987.39 = 1,563.12 : x
  2. Step 2: Convert to fraction form
    2,889.42/3,987.39 = 1,563.12/x
  3. Step 3: Cross multiply
    2,889.42x = 3,987.39 × 1,563.12
  4. Step 4: Simplify right side
    2,889.42x = 6,232,769.06
  5. Step 5: Solve for x
    x = 6,232,769.06/2,889.42
  6. Step 6: Final answer
    x = 2,157.10

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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.