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Finding the Fourth Proportional to 18,757.40, 28,143.39 and 18,475.84

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Solution

The fourth proportional to 18,757.40, 28,143.39 and 18,475.84 is: 27,720.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,757.40 : 28,143.39 = 18,475.84 : x
  2. Step 2: Convert to fraction form
    18,757.40/28,143.39 = 18,475.84/x
  3. Step 3: Cross multiply
    18,757.40x = 28,143.39 × 18,475.84
  4. Step 4: Simplify right side
    18,757.40x = 519,972,629.98
  5. Step 5: Solve for x
    x = 519,972,629.98/18,757.40
  6. Step 6: Final answer
    x = 27,720.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.