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Finding the Fourth Proportional to 13,878.77, 20,818.30 and 11,101.88

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Solution

The fourth proportional to 13,878.77, 20,818.30 and 11,101.88 is: 16,652.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,878.77 : 20,818.30 = 11,101.88 : x
  2. Step 2: Convert to fraction form
    13,878.77/20,818.30 = 11,101.88/x
  3. Step 3: Cross multiply
    13,878.77x = 20,818.30 × 11,101.88
  4. Step 4: Simplify right side
    13,878.77x = 231,122,292.70
  5. Step 5: Solve for x
    x = 231,122,292.70/13,878.77
  6. Step 6: Final answer
    x = 16,652.94

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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.