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Finding the Fourth Proportional to 18,855.60, 28,276.20 and 5,703.60

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Solution

The fourth proportional to 18,855.60, 28,276.20 and 5,703.60 is: 8,553.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,855.60 : 28,276.20 = 5,703.60 : x
  2. Step 2: Convert to fraction form
    18,855.60/28,276.20 = 5,703.60/x
  3. Step 3: Cross multiply
    18,855.60x = 28,276.20 × 5,703.60
  4. Step 4: Simplify right side
    18,855.60x = 161,276,134.32
  5. Step 5: Solve for x
    x = 161,276,134.32/18,855.60
  6. Step 6: Final answer
    x = 8,553.22

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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.