Home / 5,128.83-7,078.23-3,140.64

Finding the Fourth Proportional to 5,128.83, 7,078.23 and 3,140.64

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Solution

The fourth proportional to 5,128.83, 7,078.23 and 3,140.64 is: 4,334.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.83 : 7,078.23 = 3,140.64 : x
  2. Step 2: Convert to fraction form
    5,128.83/7,078.23 = 3,140.64/x
  3. Step 3: Cross multiply
    5,128.83x = 7,078.23 × 3,140.64
  4. Step 4: Simplify right side
    5,128.83x = 22,230,172.27
  5. Step 5: Solve for x
    x = 22,230,172.27/5,128.83
  6. Step 6: Final answer
    x = 4,334.36

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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.