Home / 3,611.36-5,416.11-1,420.10

Finding the Fourth Proportional to 3,611.36, 5,416.11 and 1,420.10

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Solution

The fourth proportional to 3,611.36, 5,416.11 and 1,420.10 is: 2,129.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,611.36 : 5,416.11 = 1,420.10 : x
  2. Step 2: Convert to fraction form
    3,611.36/5,416.11 = 1,420.10/x
  3. Step 3: Cross multiply
    3,611.36x = 5,416.11 × 1,420.10
  4. Step 4: Simplify right side
    3,611.36x = 7,691,417.81
  5. Step 5: Solve for x
    x = 7,691,417.81/3,611.36
  6. Step 6: Final answer
    x = 2,129.78

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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.