Home / 5,087.56-7,018.48-2,990.20

Finding the Fourth Proportional to 5,087.56, 7,018.48 and 2,990.20

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Solution

The fourth proportional to 5,087.56, 7,018.48 and 2,990.20 is: 4,125.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,087.56 : 7,018.48 = 2,990.20 : x
  2. Step 2: Convert to fraction form
    5,087.56/7,018.48 = 2,990.20/x
  3. Step 3: Cross multiply
    5,087.56x = 7,018.48 × 2,990.20
  4. Step 4: Simplify right side
    5,087.56x = 20,986,658.90
  5. Step 5: Solve for x
    x = 20,986,658.90/5,087.56
  6. Step 6: Final answer
    x = 4,125.09

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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.