Home / 3,890.88-5,839.20-3,130.56

Finding the Fourth Proportional to 3,890.88, 5,839.20 and 3,130.56

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Solution

The fourth proportional to 3,890.88, 5,839.20 and 3,130.56 is: 4,698.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,890.88 : 5,839.20 = 3,130.56 : x
  2. Step 2: Convert to fraction form
    3,890.88/5,839.20 = 3,130.56/x
  3. Step 3: Cross multiply
    3,890.88x = 5,839.20 × 3,130.56
  4. Step 4: Simplify right side
    3,890.88x = 18,279,965.95
  5. Step 5: Solve for x
    x = 18,279,965.95/3,890.88
  6. Step 6: Final answer
    x = 4,698.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.