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Finding the Fourth Proportional to 14,794.77, 20,414.08 and 8,420.99

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Solution

The fourth proportional to 14,794.77, 20,414.08 and 8,420.99 is: 11,619.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,794.77 : 20,414.08 = 8,420.99 : x
  2. Step 2: Convert to fraction form
    14,794.77/20,414.08 = 8,420.99/x
  3. Step 3: Cross multiply
    14,794.77x = 20,414.08 × 8,420.99
  4. Step 4: Simplify right side
    14,794.77x = 171,906,624.63
  5. Step 5: Solve for x
    x = 171,906,624.63/14,794.77
  6. Step 6: Final answer
    x = 11,619.42

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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.