Home / 5,485.50-7,570.08-3,128.94

Finding the Fourth Proportional to 5,485.50, 7,570.08 and 3,128.94

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Solution

The fourth proportional to 5,485.50, 7,570.08 and 3,128.94 is: 4,317.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,485.50 : 7,570.08 = 3,128.94 : x
  2. Step 2: Convert to fraction form
    5,485.50/7,570.08 = 3,128.94/x
  3. Step 3: Cross multiply
    5,485.50x = 7,570.08 × 3,128.94
  4. Step 4: Simplify right side
    5,485.50x = 23,686,326.12
  5. Step 5: Solve for x
    x = 23,686,326.12/5,485.50
  6. Step 6: Final answer
    x = 4,317.99

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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.