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Finding the Fourth Proportional to 13,722.58, 18,936.18 and 8,057.58

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Solution

The fourth proportional to 13,722.58, 18,936.18 and 8,057.58 is: 11,118.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,722.58 : 18,936.18 = 8,057.58 : x
  2. Step 2: Convert to fraction form
    13,722.58/18,936.18 = 8,057.58/x
  3. Step 3: Cross multiply
    13,722.58x = 18,936.18 × 8,057.58
  4. Step 4: Simplify right side
    13,722.58x = 152,579,714.23
  5. Step 5: Solve for x
    x = 152,579,714.23/13,722.58
  6. Step 6: Final answer
    x = 11,118.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.