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Finding the Fourth Proportional to 18,691.56, 28,037.88 and 7,002.54

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Solution

The fourth proportional to 18,691.56, 28,037.88 and 7,002.54 is: 10,504.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,691.56 : 28,037.88 = 7,002.54 : x
  2. Step 2: Convert to fraction form
    18,691.56/28,037.88 = 7,002.54/x
  3. Step 3: Cross multiply
    18,691.56x = 28,037.88 × 7,002.54
  4. Step 4: Simplify right side
    18,691.56x = 196,336,376.22
  5. Step 5: Solve for x
    x = 196,336,376.22/18,691.56
  6. Step 6: Final answer
    x = 10,504.01

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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.