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Finding the Fourth Proportional to 28,037, 38,691.62 and 18,118.28

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Solution

The fourth proportional to 28,037, 38,691.62 and 18,118.28 is: 25,003.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,037 : 38,691.62 = 18,118.28 : x
  2. Step 2: Convert to fraction form
    28,037/38,691.62 = 18,118.28/x
  3. Step 3: Cross multiply
    28,037x = 38,691.62 × 18,118.28
  4. Step 4: Simplify right side
    28,037x = 701,025,604.81
  5. Step 5: Solve for x
    x = 701,025,604.81/28,037
  6. Step 6: Final answer
    x = 25,003.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.