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Finding the Fourth Proportional to 19,607.20, 29,410.80 and 8,519.20

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Solution

The fourth proportional to 19,607.20, 29,410.80 and 8,519.20 is: 12,778.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,607.20 : 29,410.80 = 8,519.20 : x
  2. Step 2: Convert to fraction form
    19,607.20/29,410.80 = 8,519.20/x
  3. Step 3: Cross multiply
    19,607.20x = 29,410.80 × 8,519.20
  4. Step 4: Simplify right side
    19,607.20x = 250,556,487.36
  5. Step 5: Solve for x
    x = 250,556,487.36/19,607.20
  6. Step 6: Final answer
    x = 12,778.80

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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.