Home / 2,421.12-3,623.58-2,128.44

Finding the Fourth Proportional to 2,421.12, 3,623.58 and 2,128.44

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Solution

The fourth proportional to 2,421.12, 3,623.58 and 2,128.44 is: 3,185.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,421.12 : 3,623.58 = 2,128.44 : x
  2. Step 2: Convert to fraction form
    2,421.12/3,623.58 = 2,128.44/x
  3. Step 3: Cross multiply
    2,421.12x = 3,623.58 × 2,128.44
  4. Step 4: Simplify right side
    2,421.12x = 7,712,572.62
  5. Step 5: Solve for x
    x = 7,712,572.62/2,421.12
  6. Step 6: Final answer
    x = 3,185.54

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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.