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Finding the Fourth Proportional to 13,618.91, 20,401.03 and 9,928.96

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Solution

The fourth proportional to 13,618.91, 20,401.03 and 9,928.96 is: 14,873.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,618.91 : 20,401.03 = 9,928.96 : x
  2. Step 2: Convert to fraction form
    13,618.91/20,401.03 = 9,928.96/x
  3. Step 3: Cross multiply
    13,618.91x = 20,401.03 × 9,928.96
  4. Step 4: Simplify right side
    13,618.91x = 202,561,010.83
  5. Step 5: Solve for x
    x = 202,561,010.83/13,618.91
  6. Step 6: Final answer
    x = 14,873.51

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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.