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Finding the Fourth Proportional to 18,838.52, 28,262.07 and 8,311.51

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Solution

The fourth proportional to 18,838.52, 28,262.07 and 8,311.51 is: 12,469.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,838.52 : 28,262.07 = 8,311.51 : x
  2. Step 2: Convert to fraction form
    18,838.52/28,262.07 = 8,311.51/x
  3. Step 3: Cross multiply
    18,838.52x = 28,262.07 × 8,311.51
  4. Step 4: Simplify right side
    18,838.52x = 234,900,406.77
  5. Step 5: Solve for x
    x = 234,900,406.77/18,838.52
  6. Step 6: Final answer
    x = 12,469.16

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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.