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Finding the Fourth Proportional to 18,717.54, 28,059.78 and 7,633.50

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Solution

The fourth proportional to 18,717.54, 28,059.78 and 7,633.50 is: 11,443.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,717.54 : 28,059.78 = 7,633.50 : x
  2. Step 2: Convert to fraction form
    18,717.54/28,059.78 = 7,633.50/x
  3. Step 3: Cross multiply
    18,717.54x = 28,059.78 × 7,633.50
  4. Step 4: Simplify right side
    18,717.54x = 214,194,330.63
  5. Step 5: Solve for x
    x = 214,194,330.63/18,717.54
  6. Step 6: Final answer
    x = 11,443.51

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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.