Home / 3,539.20-4,871.20-3,116.79

Finding the Fourth Proportional to 3,539.20, 4,871.20 and 3,116.79

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Solution

The fourth proportional to 3,539.20, 4,871.20 and 3,116.79 is: 4,289.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,539.20 : 4,871.20 = 3,116.79 : x
  2. Step 2: Convert to fraction form
    3,539.20/4,871.20 = 3,116.79/x
  3. Step 3: Cross multiply
    3,539.20x = 4,871.20 × 3,116.79
  4. Step 4: Simplify right side
    3,539.20x = 15,182,507.45
  5. Step 5: Solve for x
    x = 15,182,507.45/3,539.20
  6. Step 6: Final answer
    x = 4,289.81

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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.