Home / 5,124.87-7,072.14-2,887.21

Finding the Fourth Proportional to 5,124.87, 7,072.14 and 2,887.21

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Solution

The fourth proportional to 5,124.87, 7,072.14 and 2,887.21 is: 3,984.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,124.87 : 7,072.14 = 2,887.21 : x
  2. Step 2: Convert to fraction form
    5,124.87/7,072.14 = 2,887.21/x
  3. Step 3: Cross multiply
    5,124.87x = 7,072.14 × 2,887.21
  4. Step 4: Simplify right side
    5,124.87x = 20,418,773.00
  5. Step 5: Solve for x
    x = 20,418,773.00/5,124.87
  6. Step 6: Final answer
    x = 3,984.25

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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.