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Finding the Fourth Proportional to 18,573.80, 27,865.08 and 5,426.48

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Solution

The fourth proportional to 18,573.80, 27,865.08 and 5,426.48 is: 8,141.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,573.80 : 27,865.08 = 5,426.48 : x
  2. Step 2: Convert to fraction form
    18,573.80/27,865.08 = 5,426.48/x
  3. Step 3: Cross multiply
    18,573.80x = 27,865.08 × 5,426.48
  4. Step 4: Simplify right side
    18,573.80x = 151,209,299.32
  5. Step 5: Solve for x
    x = 151,209,299.32/18,573.80
  6. Step 6: Final answer
    x = 8,141.00

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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.