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Finding the Fourth Proportional to 38,684.88, 58,015.19 and 14,990.78

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Solution

The fourth proportional to 38,684.88, 58,015.19 and 14,990.78 is: 22,481.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,684.88 : 58,015.19 = 14,990.78 : x
  2. Step 2: Convert to fraction form
    38,684.88/58,015.19 = 14,990.78/x
  3. Step 3: Cross multiply
    38,684.88x = 58,015.19 × 14,990.78
  4. Step 4: Simplify right side
    38,684.88x = 869,693,129.72
  5. Step 5: Solve for x
    x = 869,693,129.72/38,684.88
  6. Step 6: Final answer
    x = 22,481.47

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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.