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Finding the Fourth Proportional to 7,072.73, 9,762.13 and 4,090.30

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Solution

The fourth proportional to 7,072.73, 9,762.13 and 4,090.30 is: 5,645.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,072.73 : 9,762.13 = 4,090.30 : x
  2. Step 2: Convert to fraction form
    7,072.73/9,762.13 = 4,090.30/x
  3. Step 3: Cross multiply
    7,072.73x = 9,762.13 × 4,090.30
  4. Step 4: Simplify right side
    7,072.73x = 39,930,040.34
  5. Step 5: Solve for x
    x = 39,930,040.34/7,072.73
  6. Step 6: Final answer
    x = 5,645.63

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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.