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Finding the Fourth Proportional to 18,513.60, 27,765.90 and 5,364.60

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Solution

The fourth proportional to 18,513.60, 27,765.90 and 5,364.60 is: 8,045.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,513.60 : 27,765.90 = 5,364.60 : x
  2. Step 2: Convert to fraction form
    18,513.60/27,765.90 = 5,364.60/x
  3. Step 3: Cross multiply
    18,513.60x = 27,765.90 × 5,364.60
  4. Step 4: Simplify right side
    18,513.60x = 148,952,947.14
  5. Step 5: Solve for x
    x = 148,952,947.14/18,513.60
  6. Step 6: Final answer
    x = 8,045.60

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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.