Home / 2,187.12-3,021.12-1,621.11

Finding the Fourth Proportional to 2,187.12, 3,021.12 and 1,621.11

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Solution

The fourth proportional to 2,187.12, 3,021.12 and 1,621.11 is: 2,239.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187.12 : 3,021.12 = 1,621.11 : x
  2. Step 2: Convert to fraction form
    2,187.12/3,021.12 = 1,621.11/x
  3. Step 3: Cross multiply
    2,187.12x = 3,021.12 × 1,621.11
  4. Step 4: Simplify right side
    2,187.12x = 4,897,567.84
  5. Step 5: Solve for x
    x = 4,897,567.84/2,187.12
  6. Step 6: Final answer
    x = 2,239.28

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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.