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Finding the Fourth Proportional to 23,109.20, 34,615.20 and 19,221.20

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Solution

The fourth proportional to 23,109.20, 34,615.20 and 19,221.20 is: 28,791.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,109.20 : 34,615.20 = 19,221.20 : x
  2. Step 2: Convert to fraction form
    23,109.20/34,615.20 = 19,221.20/x
  3. Step 3: Cross multiply
    23,109.20x = 34,615.20 × 19,221.20
  4. Step 4: Simplify right side
    23,109.20x = 665,345,682.24
  5. Step 5: Solve for x
    x = 665,345,682.24/23,109.20
  6. Step 6: Final answer
    x = 28,791.38

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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.