Home / 7,129.40-10,697.30-3,231.80

Finding the Fourth Proportional to 7,129.40, 10,697.30 and 3,231.80

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Solution

The fourth proportional to 7,129.40, 10,697.30 and 3,231.80 is: 4,849.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,129.40 : 10,697.30 = 3,231.80 : x
  2. Step 2: Convert to fraction form
    7,129.40/10,697.30 = 3,231.80/x
  3. Step 3: Cross multiply
    7,129.40x = 10,697.30 × 3,231.80
  4. Step 4: Simplify right side
    7,129.40x = 34,571,534.14
  5. Step 5: Solve for x
    x = 34,571,534.14/7,129.40
  6. Step 6: Final answer
    x = 4,849.15

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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.