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Finding the Fourth Proportional to 18,955.38, 28,433.07 and 5,104.38

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Solution

The fourth proportional to 18,955.38, 28,433.07 and 5,104.38 is: 7,656.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,955.38 : 28,433.07 = 5,104.38 : x
  2. Step 2: Convert to fraction form
    18,955.38/28,433.07 = 5,104.38/x
  3. Step 3: Cross multiply
    18,955.38x = 28,433.07 × 5,104.38
  4. Step 4: Simplify right side
    18,955.38x = 145,133,193.85
  5. Step 5: Solve for x
    x = 145,133,193.85/18,955.38
  6. Step 6: Final answer
    x = 7,656.57

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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.