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Finding the Fourth Proportional to 5,165.82, 7,128.54 and 2,928.24

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Solution

The fourth proportional to 5,165.82, 7,128.54 and 2,928.24 is: 4,040.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,165.82 : 7,128.54 = 2,928.24 : x
  2. Step 2: Convert to fraction form
    5,165.82/7,128.54 = 2,928.24/x
  3. Step 3: Cross multiply
    5,165.82x = 7,128.54 × 2,928.24
  4. Step 4: Simplify right side
    5,165.82x = 20,874,075.97
  5. Step 5: Solve for x
    x = 20,874,075.97/5,165.82
  6. Step 6: Final answer
    x = 4,040.81

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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.