Home / 7,408.80-11,111.54-2,142.64

Finding the Fourth Proportional to 7,408.80, 11,111.54 and 2,142.64

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Solution

The fourth proportional to 7,408.80, 11,111.54 and 2,142.64 is: 3,213.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,408.80 : 11,111.54 = 2,142.64 : x
  2. Step 2: Convert to fraction form
    7,408.80/11,111.54 = 2,142.64/x
  3. Step 3: Cross multiply
    7,408.80x = 11,111.54 × 2,142.64
  4. Step 4: Simplify right side
    7,408.80x = 23,808,014.04
  5. Step 5: Solve for x
    x = 23,808,014.04/7,408.80
  6. Step 6: Final answer
    x = 3,213.48

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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.