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Finding the Fourth Proportional to 30,090.44, 45,135.88 and 7,903.78

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Solution

The fourth proportional to 30,090.44, 45,135.88 and 7,903.78 is: 11,855.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,090.44 : 45,135.88 = 7,903.78 : x
  2. Step 2: Convert to fraction form
    30,090.44/45,135.88 = 7,903.78/x
  3. Step 3: Cross multiply
    30,090.44x = 45,135.88 × 7,903.78
  4. Step 4: Simplify right side
    30,090.44x = 356,743,977.49
  5. Step 5: Solve for x
    x = 356,743,977.49/30,090.44
  6. Step 6: Final answer
    x = 11,855.73

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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.