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Finding the Fourth Proportional to 18,838.56, 28,260.96 and 6,359.76

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Solution

The fourth proportional to 18,838.56, 28,260.96 and 6,359.76 is: 9,540.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,838.56 : 28,260.96 = 6,359.76 : x
  2. Step 2: Convert to fraction form
    18,838.56/28,260.96 = 6,359.76/x
  3. Step 3: Cross multiply
    18,838.56x = 28,260.96 × 6,359.76
  4. Step 4: Simplify right side
    18,838.56x = 179,732,922.97
  5. Step 5: Solve for x
    x = 179,732,922.97/18,838.56
  6. Step 6: Final answer
    x = 9,540.69

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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.