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Finding the Fourth Proportional to 19,272.60, 28,851.30 and 11,477.40

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Solution

The fourth proportional to 19,272.60, 28,851.30 and 11,477.40 is: 17,181.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,272.60 : 28,851.30 = 11,477.40 : x
  2. Step 2: Convert to fraction form
    19,272.60/28,851.30 = 11,477.40/x
  3. Step 3: Cross multiply
    19,272.60x = 28,851.30 × 11,477.40
  4. Step 4: Simplify right side
    19,272.60x = 331,137,910.62
  5. Step 5: Solve for x
    x = 331,137,910.62/19,272.60
  6. Step 6: Final answer
    x = 17,181.80

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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.