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Finding the Fourth Proportional to 13,657.68, 18,830.88 and 10,819.44

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Solution

The fourth proportional to 13,657.68, 18,830.88 and 10,819.44 is: 14,917.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,657.68 : 18,830.88 = 10,819.44 : x
  2. Step 2: Convert to fraction form
    13,657.68/18,830.88 = 10,819.44/x
  3. Step 3: Cross multiply
    13,657.68x = 18,830.88 × 10,819.44
  4. Step 4: Simplify right side
    13,657.68x = 203,739,576.31
  5. Step 5: Solve for x
    x = 203,739,576.31/13,657.68
  6. Step 6: Final answer
    x = 14,917.58

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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.