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Finding the Fourth Proportional to 18,503.10, 27,754.58 and 8,636.90

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Solution

The fourth proportional to 18,503.10, 27,754.58 and 8,636.90 is: 12,955.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,503.10 : 27,754.58 = 8,636.90 : x
  2. Step 2: Convert to fraction form
    18,503.10/27,754.58 = 8,636.90/x
  3. Step 3: Cross multiply
    18,503.10x = 27,754.58 × 8,636.90
  4. Step 4: Simplify right side
    18,503.10x = 239,713,532.00
  5. Step 5: Solve for x
    x = 239,713,532.00/18,503.10
  6. Step 6: Final answer
    x = 12,955.32

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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.