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Finding the Fourth Proportional to 30,388.40, 45,609.60 and 17,892.80

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Solution

The fourth proportional to 30,388.40, 45,609.60 and 17,892.80 is: 26,855.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,388.40 : 45,609.60 = 17,892.80 : x
  2. Step 2: Convert to fraction form
    30,388.40/45,609.60 = 17,892.80/x
  3. Step 3: Cross multiply
    30,388.40x = 45,609.60 × 17,892.80
  4. Step 4: Simplify right side
    30,388.40x = 816,083,450.88
  5. Step 5: Solve for x
    x = 816,083,450.88/30,388.40
  6. Step 6: Final answer
    x = 26,855.10

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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.