Home / 2,813.13-4,212.81-1,987.47

Finding the Fourth Proportional to 2,813.13, 4,212.81 and 1,987.47

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Solution

The fourth proportional to 2,813.13, 4,212.81 and 1,987.47 is: 2,976.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,813.13 : 4,212.81 = 1,987.47 : x
  2. Step 2: Convert to fraction form
    2,813.13/4,212.81 = 1,987.47/x
  3. Step 3: Cross multiply
    2,813.13x = 4,212.81 × 1,987.47
  4. Step 4: Simplify right side
    2,813.13x = 8,372,833.49
  5. Step 5: Solve for x
    x = 8,372,833.49/2,813.13
  6. Step 6: Final answer
    x = 2,976.34

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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.