Home / 2,889.59-3,987.65-1,563.31

Finding the Fourth Proportional to 2,889.59, 3,987.65 and 1,563.31

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Solution

The fourth proportional to 2,889.59, 3,987.65 and 1,563.31 is: 2,157.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,889.59 : 3,987.65 = 1,563.31 : x
  2. Step 2: Convert to fraction form
    2,889.59/3,987.65 = 1,563.31/x
  3. Step 3: Cross multiply
    2,889.59x = 3,987.65 × 1,563.31
  4. Step 4: Simplify right side
    2,889.59x = 6,233,918.27
  5. Step 5: Solve for x
    x = 6,233,918.27/2,889.59
  6. Step 6: Final answer
    x = 2,157.37

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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.