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Finding the Fourth Proportional to 36,478.38, 54,724.86 and 11,520.76

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Solution

The fourth proportional to 36,478.38, 54,724.86 and 11,520.76 is: 17,283.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,478.38 : 54,724.86 = 11,520.76 : x
  2. Step 2: Convert to fraction form
    36,478.38/54,724.86 = 11,520.76/x
  3. Step 3: Cross multiply
    36,478.38x = 54,724.86 × 11,520.76
  4. Step 4: Simplify right side
    36,478.38x = 630,471,978.09
  5. Step 5: Solve for x
    x = 630,471,978.09/36,478.38
  6. Step 6: Final answer
    x = 17,283.44

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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.