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Finding the Fourth Proportional to 38,406.20, 57,609.30 and 18,723.20

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Solution

The fourth proportional to 38,406.20, 57,609.30 and 18,723.20 is: 28,084.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,406.20 : 57,609.30 = 18,723.20 : x
  2. Step 2: Convert to fraction form
    38,406.20/57,609.30 = 18,723.20/x
  3. Step 3: Cross multiply
    38,406.20x = 57,609.30 × 18,723.20
  4. Step 4: Simplify right side
    38,406.20x = 1,078,630,445.76
  5. Step 5: Solve for x
    x = 1,078,630,445.76/38,406.20
  6. Step 6: Final answer
    x = 28,084.80

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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.