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Finding the Fourth Proportional to 20,476, 28,236 and 19,285.60

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Solution

The fourth proportional to 20,476, 28,236 and 19,285.60 is: 26,594.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,476 : 28,236 = 19,285.60 : x
  2. Step 2: Convert to fraction form
    20,476/28,236 = 19,285.60/x
  3. Step 3: Cross multiply
    20,476x = 28,236 × 19,285.60
  4. Step 4: Simplify right side
    20,476x = 544,548,201.60
  5. Step 5: Solve for x
    x = 544,548,201.60/20,476
  6. Step 6: Final answer
    x = 26,594.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.