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Finding the Fourth Proportional to 13,200.72, 19,801.08 and 5,404.20

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Solution

The fourth proportional to 13,200.72, 19,801.08 and 5,404.20 is: 8,106.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,200.72 : 19,801.08 = 5,404.20 : x
  2. Step 2: Convert to fraction form
    13,200.72/19,801.08 = 5,404.20/x
  3. Step 3: Cross multiply
    13,200.72x = 19,801.08 × 5,404.20
  4. Step 4: Simplify right side
    13,200.72x = 107,008,996.54
  5. Step 5: Solve for x
    x = 107,008,996.54/13,200.72
  6. Step 6: Final answer
    x = 8,106.30

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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.