Home / 7,129.40-10,679.70-4,047.80

Finding the Fourth Proportional to 7,129.40, 10,679.70 and 4,047.80

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Solution

The fourth proportional to 7,129.40, 10,679.70 and 4,047.80 is: 6,063.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,129.40 : 10,679.70 = 4,047.80 : x
  2. Step 2: Convert to fraction form
    7,129.40/10,679.70 = 4,047.80/x
  3. Step 3: Cross multiply
    7,129.40x = 10,679.70 × 4,047.80
  4. Step 4: Simplify right side
    7,129.40x = 43,229,289.66
  5. Step 5: Solve for x
    x = 43,229,289.66/7,129.40
  6. Step 6: Final answer
    x = 6,063.52

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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.