Home / 3,421-4,720.98-2,179.72

Finding the Fourth Proportional to 3,421, 4,720.98 and 2,179.72

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Solution

The fourth proportional to 3,421, 4,720.98 and 2,179.72 is: 3,008.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,421 : 4,720.98 = 2,179.72 : x
  2. Step 2: Convert to fraction form
    3,421/4,720.98 = 2,179.72/x
  3. Step 3: Cross multiply
    3,421x = 4,720.98 × 2,179.72
  4. Step 4: Simplify right side
    3,421x = 10,290,414.53
  5. Step 5: Solve for x
    x = 10,290,414.53/3,421
  6. Step 6: Final answer
    x = 3,008.01

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Double scale
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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.