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Finding the Fourth Proportional to 30,388.60, 45,563.10 and 27,278.20

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Solution

The fourth proportional to 30,388.60, 45,563.10 and 27,278.20 is: 40,899.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,388.60 : 45,563.10 = 27,278.20 : x
  2. Step 2: Convert to fraction form
    30,388.60/45,563.10 = 27,278.20/x
  3. Step 3: Cross multiply
    30,388.60x = 45,563.10 × 27,278.20
  4. Step 4: Simplify right side
    30,388.60x = 1,242,879,354.42
  5. Step 5: Solve for x
    x = 1,242,879,354.42/30,388.60
  6. Step 6: Final answer
    x = 40,899.53

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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.