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Finding the Fourth Proportional to 13,818.56, 20,714.78 and 5,503.71

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Solution

The fourth proportional to 13,818.56, 20,714.78 and 5,503.71 is: 8,250.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,818.56 : 20,714.78 = 5,503.71 : x
  2. Step 2: Convert to fraction form
    13,818.56/20,714.78 = 5,503.71/x
  3. Step 3: Cross multiply
    13,818.56x = 20,714.78 × 5,503.71
  4. Step 4: Simplify right side
    13,818.56x = 114,008,141.83
  5. Step 5: Solve for x
    x = 114,008,141.83/13,818.56
  6. Step 6: Final answer
    x = 8,250.36

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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.