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Finding the Fourth Proportional to 18,705.58, 28,063.70 and 5,558.20

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Solution

The fourth proportional to 18,705.58, 28,063.70 and 5,558.20 is: 8,338.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,705.58 : 28,063.70 = 5,558.20 : x
  2. Step 2: Convert to fraction form
    18,705.58/28,063.70 = 5,558.20/x
  3. Step 3: Cross multiply
    18,705.58x = 28,063.70 × 5,558.20
  4. Step 4: Simplify right side
    18,705.58x = 155,983,657.34
  5. Step 5: Solve for x
    x = 155,983,657.34/18,705.58
  6. Step 6: Final answer
    x = 8,338.88

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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.