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Finding the Fourth Proportional to 13,808.77, 20,608.82 and 12,872.41

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Solution

The fourth proportional to 13,808.77, 20,608.82 and 12,872.41 is: 19,211.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,808.77 : 20,608.82 = 12,872.41 : x
  2. Step 2: Convert to fraction form
    13,808.77/20,608.82 = 12,872.41/x
  3. Step 3: Cross multiply
    13,808.77x = 20,608.82 × 12,872.41
  4. Step 4: Simplify right side
    13,808.77x = 265,285,180.66
  5. Step 5: Solve for x
    x = 265,285,180.66/13,808.77
  6. Step 6: Final answer
    x = 19,211.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.