Home / 7,072.40-9,761.64-4,278.80

Finding the Fourth Proportional to 7,072.40, 9,761.64 and 4,278.80

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Solution

The fourth proportional to 7,072.40, 9,761.64 and 4,278.80 is: 5,905.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,072.40 : 9,761.64 = 4,278.80 : x
  2. Step 2: Convert to fraction form
    7,072.40/9,761.64 = 4,278.80/x
  3. Step 3: Cross multiply
    7,072.40x = 9,761.64 × 4,278.80
  4. Step 4: Simplify right side
    7,072.40x = 41,768,105.23
  5. Step 5: Solve for x
    x = 41,768,105.23/7,072.40
  6. Step 6: Final answer
    x = 5,905.79

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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.