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Finding the Fourth Proportional to 19,273.20, 28,861.20 and 15,385.20

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Solution

The fourth proportional to 19,273.20, 28,861.20 and 15,385.20 is: 23,039.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,273.20 : 28,861.20 = 15,385.20 : x
  2. Step 2: Convert to fraction form
    19,273.20/28,861.20 = 15,385.20/x
  3. Step 3: Cross multiply
    19,273.20x = 28,861.20 × 15,385.20
  4. Step 4: Simplify right side
    19,273.20x = 444,035,334.24
  5. Step 5: Solve for x
    x = 444,035,334.24/19,273.20
  6. Step 6: Final answer
    x = 23,039.00

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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.