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Finding the Fourth Proportional to 18,906.48, 28,360.71 and 6,426

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Solution

The fourth proportional to 18,906.48, 28,360.71 and 6,426 is: 9,639.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,906.48 : 28,360.71 = 6,426 : x
  2. Step 2: Convert to fraction form
    18,906.48/28,360.71 = 6,426/x
  3. Step 3: Cross multiply
    18,906.48x = 28,360.71 × 6,426
  4. Step 4: Simplify right side
    18,906.48x = 182,245,922.46
  5. Step 5: Solve for x
    x = 182,245,922.46/18,906.48
  6. Step 6: Final answer
    x = 9,639.34

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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.