Home / 5,125.12-7,072.80-2,887.42

Finding the Fourth Proportional to 5,125.12, 7,072.80 and 2,887.42

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Solution

The fourth proportional to 5,125.12, 7,072.80 and 2,887.42 is: 3,984.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,125.12 : 7,072.80 = 2,887.42 : x
  2. Step 2: Convert to fraction form
    5,125.12/7,072.80 = 2,887.42/x
  3. Step 3: Cross multiply
    5,125.12x = 7,072.80 × 2,887.42
  4. Step 4: Simplify right side
    5,125.12x = 20,422,144.18
  5. Step 5: Solve for x
    x = 20,422,144.18/5,125.12
  6. Step 6: Final answer
    x = 3,984.72

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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.