Home / 7,121.40-10,682.08-3,610.84

Finding the Fourth Proportional to 7,121.40, 10,682.08 and 3,610.84

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Solution

The fourth proportional to 7,121.40, 10,682.08 and 3,610.84 is: 5,416.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121.40 : 10,682.08 = 3,610.84 : x
  2. Step 2: Convert to fraction form
    7,121.40/10,682.08 = 3,610.84/x
  3. Step 3: Cross multiply
    7,121.40x = 10,682.08 × 3,610.84
  4. Step 4: Simplify right side
    7,121.40x = 38,571,281.75
  5. Step 5: Solve for x
    x = 38,571,281.75/7,121.40
  6. Step 6: Final answer
    x = 5,416.25

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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.