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Finding the Fourth Proportional to 18,955.87, 28,239.26 and 18,102.94

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Solution

The fourth proportional to 18,955.87, 28,239.26 and 18,102.94 is: 26,968.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,955.87 : 28,239.26 = 18,102.94 : x
  2. Step 2: Convert to fraction form
    18,955.87/28,239.26 = 18,102.94/x
  3. Step 3: Cross multiply
    18,955.87x = 28,239.26 × 18,102.94
  4. Step 4: Simplify right side
    18,955.87x = 511,213,468.31
  5. Step 5: Solve for x
    x = 511,213,468.31/18,955.87
  6. Step 6: Final answer
    x = 26,968.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.