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Finding the Fourth Proportional to 36,390.40, 54,585.60 and 18,865.60

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Solution

The fourth proportional to 36,390.40, 54,585.60 and 18,865.60 is: 28,298.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,390.40 : 54,585.60 = 18,865.60 : x
  2. Step 2: Convert to fraction form
    36,390.40/54,585.60 = 18,865.60/x
  3. Step 3: Cross multiply
    36,390.40x = 54,585.60 × 18,865.60
  4. Step 4: Simplify right side
    36,390.40x = 1,029,790,095.36
  5. Step 5: Solve for x
    x = 1,029,790,095.36/36,390.40
  6. Step 6: Final answer
    x = 28,298.40

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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.