Home / 5,485.83-7,570.58-3,128.19

Finding the Fourth Proportional to 5,485.83, 7,570.58 and 3,128.19

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Solution

The fourth proportional to 5,485.83, 7,570.58 and 3,128.19 is: 4,316.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,485.83 : 7,570.58 = 3,128.19 : x
  2. Step 2: Convert to fraction form
    5,485.83/7,570.58 = 3,128.19/x
  3. Step 3: Cross multiply
    5,485.83x = 7,570.58 × 3,128.19
  4. Step 4: Simplify right side
    5,485.83x = 23,682,197.01
  5. Step 5: Solve for x
    x = 23,682,197.01/5,485.83
  6. Step 6: Final answer
    x = 4,316.98

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Half scale
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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.