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Finding the Fourth Proportional to 18,929.54, 28,394.32 and 8,529.14

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Solution

The fourth proportional to 18,929.54, 28,394.32 and 8,529.14 is: 12,793.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,929.54 : 28,394.32 = 8,529.14 : x
  2. Step 2: Convert to fraction form
    18,929.54/28,394.32 = 8,529.14/x
  3. Step 3: Cross multiply
    18,929.54x = 28,394.32 × 8,529.14
  4. Step 4: Simplify right side
    18,929.54x = 242,179,130.48
  5. Step 5: Solve for x
    x = 242,179,130.48/18,929.54
  6. Step 6: Final answer
    x = 12,793.71

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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.