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Finding the Fourth Proportional to 18,607.80, 27,911.70 and 11,208.45

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Solution

The fourth proportional to 18,607.80, 27,911.70 and 11,208.45 is: 16,812.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,607.80 : 27,911.70 = 11,208.45 : x
  2. Step 2: Convert to fraction form
    18,607.80/27,911.70 = 11,208.45/x
  3. Step 3: Cross multiply
    18,607.80x = 27,911.70 × 11,208.45
  4. Step 4: Simplify right side
    18,607.80x = 312,846,893.87
  5. Step 5: Solve for x
    x = 312,846,893.87/18,607.80
  6. Step 6: Final answer
    x = 16,812.68

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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.