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Finding the Fourth Proportional to 38,708.60, 58,062.90 and 18,999.80

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Solution

The fourth proportional to 38,708.60, 58,062.90 and 18,999.80 is: 28,499.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,708.60 : 58,062.90 = 18,999.80 : x
  2. Step 2: Convert to fraction form
    38,708.60/58,062.90 = 18,999.80/x
  3. Step 3: Cross multiply
    38,708.60x = 58,062.90 × 18,999.80
  4. Step 4: Simplify right side
    38,708.60x = 1,103,183,487.42
  5. Step 5: Solve for x
    x = 1,103,183,487.42/38,708.60
  6. Step 6: Final answer
    x = 28,499.70

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Similar ratio
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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.