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Finding the Fourth Proportional to 38,582.80, 57,760.80 and 28,765.60

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Solution

The fourth proportional to 38,582.80, 57,760.80 and 28,765.60 is: 43,063.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,582.80 : 57,760.80 = 28,765.60 : x
  2. Step 2: Convert to fraction form
    38,582.80/57,760.80 = 28,765.60/x
  3. Step 3: Cross multiply
    38,582.80x = 57,760.80 × 28,765.60
  4. Step 4: Simplify right side
    38,582.80x = 1,661,524,068.48
  5. Step 5: Solve for x
    x = 1,661,524,068.48/38,582.80
  6. Step 6: Final answer
    x = 43,063.85

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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.