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Finding the Fourth Proportional to 38,654.58, 57,990.13 and 11,999.98

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Solution

The fourth proportional to 38,654.58, 57,990.13 and 11,999.98 is: 18,002.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,654.58 : 57,990.13 = 11,999.98 : x
  2. Step 2: Convert to fraction form
    38,654.58/57,990.13 = 11,999.98/x
  3. Step 3: Cross multiply
    38,654.58x = 57,990.13 × 11,999.98
  4. Step 4: Simplify right side
    38,654.58x = 695,880,400.20
  5. Step 5: Solve for x
    x = 695,880,400.20/38,654.58
  6. Step 6: Final answer
    x = 18,002.53

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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.