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Finding the Fourth Proportional to 18,759.57, 28,143.52 and 7,072.89

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Solution

The fourth proportional to 18,759.57, 28,143.52 and 7,072.89 is: 10,610.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,759.57 : 28,143.52 = 7,072.89 : x
  2. Step 2: Convert to fraction form
    18,759.57/28,143.52 = 7,072.89/x
  3. Step 3: Cross multiply
    18,759.57x = 28,143.52 × 7,072.89
  4. Step 4: Simplify right side
    18,759.57x = 199,055,985.81
  5. Step 5: Solve for x
    x = 199,055,985.81/18,759.57
  6. Step 6: Final answer
    x = 10,610.90

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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.