Home / 3,580.21-5,370.10-2,128.60

Finding the Fourth Proportional to 3,580.21, 5,370.10 and 2,128.60

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Solution

The fourth proportional to 3,580.21, 5,370.10 and 2,128.60 is: 3,192.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,580.21 : 5,370.10 = 2,128.60 : x
  2. Step 2: Convert to fraction form
    3,580.21/5,370.10 = 2,128.60/x
  3. Step 3: Cross multiply
    3,580.21x = 5,370.10 × 2,128.60
  4. Step 4: Simplify right side
    3,580.21x = 11,430,776.11
  5. Step 5: Solve for x
    x = 11,430,776.11/3,580.21
  6. Step 6: Final answer
    x = 3,192.77

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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.