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Finding the Fourth Proportional to 18,892.50, 25,905.86 and 18,400.43

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Solution

The fourth proportional to 18,892.50, 25,905.86 and 18,400.43 is: 25,231.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,892.50 : 25,905.86 = 18,400.43 : x
  2. Step 2: Convert to fraction form
    18,892.50/25,905.86 = 18,400.43/x
  3. Step 3: Cross multiply
    18,892.50x = 25,905.86 × 18,400.43
  4. Step 4: Simplify right side
    18,892.50x = 476,678,741.99
  5. Step 5: Solve for x
    x = 476,678,741.99/18,892.50
  6. Step 6: Final answer
    x = 25,231.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.