Home / 5,450.81-8,171.28-1,987.25

Finding the Fourth Proportional to 5,450.81, 8,171.28 and 1,987.25

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Solution

The fourth proportional to 5,450.81, 8,171.28 and 1,987.25 is: 2,979.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,450.81 : 8,171.28 = 1,987.25 : x
  2. Step 2: Convert to fraction form
    5,450.81/8,171.28 = 1,987.25/x
  3. Step 3: Cross multiply
    5,450.81x = 8,171.28 × 1,987.25
  4. Step 4: Simplify right side
    5,450.81x = 16,238,335.32
  5. Step 5: Solve for x
    x = 16,238,335.32/5,450.81
  6. Step 6: Final answer
    x = 2,979.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.