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Finding the Fourth Proportional to 13,604.88, 20,529.84 and 13,116.72

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Solution

The fourth proportional to 13,604.88, 20,529.84 and 13,116.72 is: 19,793.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,604.88 : 20,529.84 = 13,116.72 : x
  2. Step 2: Convert to fraction form
    13,604.88/20,529.84 = 13,116.72/x
  3. Step 3: Cross multiply
    13,604.88x = 20,529.84 × 13,116.72
  4. Step 4: Simplify right side
    13,604.88x = 269,284,162.92
  5. Step 5: Solve for x
    x = 269,284,162.92/13,604.88
  6. Step 6: Final answer
    x = 19,793.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.