Home / 4,213.78-5,815.41-2,421.50

Finding the Fourth Proportional to 4,213.78, 5,815.41 and 2,421.50

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Solution

The fourth proportional to 4,213.78, 5,815.41 and 2,421.50 is: 3,341.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,213.78 : 5,815.41 = 2,421.50 : x
  2. Step 2: Convert to fraction form
    4,213.78/5,815.41 = 2,421.50/x
  3. Step 3: Cross multiply
    4,213.78x = 5,815.41 × 2,421.50
  4. Step 4: Simplify right side
    4,213.78x = 14,082,015.32
  5. Step 5: Solve for x
    x = 14,082,015.32/4,213.78
  6. Step 6: Final answer
    x = 3,341.90

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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.