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Finding the Fourth Proportional to 19,616.43, 29,421.54 and 8,520.14

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Solution

The fourth proportional to 19,616.43, 29,421.54 and 8,520.14 is: 12,778.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,616.43 : 29,421.54 = 8,520.14 : x
  2. Step 2: Convert to fraction form
    19,616.43/29,421.54 = 8,520.14/x
  3. Step 3: Cross multiply
    19,616.43x = 29,421.54 × 8,520.14
  4. Step 4: Simplify right side
    19,616.43x = 250,675,713.37
  5. Step 5: Solve for x
    x = 250,675,713.37/19,616.43
  6. Step 6: Final answer
    x = 12,778.87

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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.