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Finding the Fourth Proportional to 18,628.46, 27,905.26 and 8,619.18

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Solution

The fourth proportional to 18,628.46, 27,905.26 and 8,619.18 is: 12,911.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,628.46 : 27,905.26 = 8,619.18 : x
  2. Step 2: Convert to fraction form
    18,628.46/27,905.26 = 8,619.18/x
  3. Step 3: Cross multiply
    18,628.46x = 27,905.26 × 8,619.18
  4. Step 4: Simplify right side
    18,628.46x = 240,520,458.89
  5. Step 5: Solve for x
    x = 240,520,458.89/18,628.46
  6. Step 6: Final answer
    x = 12,911.45

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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.