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Finding the Fourth Proportional to 18,800.25, 25,978.55 and 17,889.27

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Solution

The fourth proportional to 18,800.25, 25,978.55 and 17,889.27 is: 24,719.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,800.25 : 25,978.55 = 17,889.27 : x
  2. Step 2: Convert to fraction form
    18,800.25/25,978.55 = 17,889.27/x
  3. Step 3: Cross multiply
    18,800.25x = 25,978.55 × 17,889.27
  4. Step 4: Simplify right side
    18,800.25x = 464,737,295.16
  5. Step 5: Solve for x
    x = 464,737,295.16/18,800.25
  6. Step 6: Final answer
    x = 24,719.74

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1.5x scale

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.