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Finding the Fourth Proportional to 18,285.96, 27,382.10 and 12,655.83

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Solution

The fourth proportional to 18,285.96, 27,382.10 and 12,655.83 is: 18,951.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,285.96 : 27,382.10 = 12,655.83 : x
  2. Step 2: Convert to fraction form
    18,285.96/27,382.10 = 12,655.83/x
  3. Step 3: Cross multiply
    18,285.96x = 27,382.10 × 12,655.83
  4. Step 4: Simplify right side
    18,285.96x = 346,543,242.05
  5. Step 5: Solve for x
    x = 346,543,242.05/18,285.96
  6. Step 6: Final answer
    x = 18,951.33

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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.