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Finding the Fourth Proportional to 18,906.86, 28,377.81 and 9,553.46

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Solution

The fourth proportional to 18,906.86, 28,377.81 and 9,553.46 is: 14,339.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,906.86 : 28,377.81 = 9,553.46 : x
  2. Step 2: Convert to fraction form
    18,906.86/28,377.81 = 9,553.46/x
  3. Step 3: Cross multiply
    18,906.86x = 28,377.81 × 9,553.46
  4. Step 4: Simplify right side
    18,906.86x = 271,106,130.83
  5. Step 5: Solve for x
    x = 271,106,130.83/18,906.86
  6. Step 6: Final answer
    x = 14,339.03

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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.