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Finding the Fourth Proportional to 18,328.88, 25,280.80 and 16,821.31

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Solution

The fourth proportional to 18,328.88, 25,280.80 and 16,821.31 is: 23,201.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,328.88 : 25,280.80 = 16,821.31 : x
  2. Step 2: Convert to fraction form
    18,328.88/25,280.80 = 16,821.31/x
  3. Step 3: Cross multiply
    18,328.88x = 25,280.80 × 16,821.31
  4. Step 4: Simplify right side
    18,328.88x = 425,256,173.85
  5. Step 5: Solve for x
    x = 425,256,173.85/18,328.88
  6. Step 6: Final answer
    x = 23,201.43

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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.