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Finding the Fourth Proportional to 18,671.00, 28,011.69 and 8,141.94

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Solution

The fourth proportional to 18,671.00, 28,011.69 and 8,141.94 is: 12,215.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,671.00 : 28,011.69 = 8,141.94 : x
  2. Step 2: Convert to fraction form
    18,671.00/28,011.69 = 8,141.94/x
  3. Step 3: Cross multiply
    18,671.00x = 28,011.69 × 8,141.94
  4. Step 4: Simplify right side
    18,671.00x = 228,069,509.44
  5. Step 5: Solve for x
    x = 228,069,509.44/18,671.00
  6. Step 6: Final answer
    x = 12,215.17

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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.