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Finding the Fourth Proportional to 12,563.80, 18,807.30 and 11,181.40

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Solution

The fourth proportional to 12,563.80, 18,807.30 and 11,181.40 is: 16,737.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,563.80 : 18,807.30 = 11,181.40 : x
  2. Step 2: Convert to fraction form
    12,563.80/18,807.30 = 11,181.40/x
  3. Step 3: Cross multiply
    12,563.80x = 18,807.30 × 11,181.40
  4. Step 4: Simplify right side
    12,563.80x = 210,291,944.22
  5. Step 5: Solve for x
    x = 210,291,944.22/12,563.80
  6. Step 6: Final answer
    x = 16,737.93

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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.