Home / 7,014.20-9,680.40-3,989.75

Finding the Fourth Proportional to 7,014.20, 9,680.40 and 3,989.75

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Solution

The fourth proportional to 7,014.20, 9,680.40 and 3,989.75 is: 5,506.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,014.20 : 9,680.40 = 3,989.75 : x
  2. Step 2: Convert to fraction form
    7,014.20/9,680.40 = 3,989.75/x
  3. Step 3: Cross multiply
    7,014.20x = 9,680.40 × 3,989.75
  4. Step 4: Simplify right side
    7,014.20x = 38,622,327.50
  5. Step 5: Solve for x
    x = 38,622,327.50/7,014.20
  6. Step 6: Final answer
    x = 5,506.31

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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.