Home / 2,911.21-4,019.25-2,164.30

Finding the Fourth Proportional to 2,911.21, 4,019.25 and 2,164.30

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Solution

The fourth proportional to 2,911.21, 4,019.25 and 2,164.30 is: 2,988.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,911.21 : 4,019.25 = 2,164.30 : x
  2. Step 2: Convert to fraction form
    2,911.21/4,019.25 = 2,164.30/x
  3. Step 3: Cross multiply
    2,911.21x = 4,019.25 × 2,164.30
  4. Step 4: Simplify right side
    2,911.21x = 8,698,862.78
  5. Step 5: Solve for x
    x = 8,698,862.78/2,911.21
  6. Step 6: Final answer
    x = 2,988.06

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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.