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Finding the Fourth Proportional to 14,671.20, 20,245.35 and 8,620.54

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Solution

The fourth proportional to 14,671.20, 20,245.35 and 8,620.54 is: 11,895.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,671.20 : 20,245.35 = 8,620.54 : x
  2. Step 2: Convert to fraction form
    14,671.20/20,245.35 = 8,620.54/x
  3. Step 3: Cross multiply
    14,671.20x = 20,245.35 × 8,620.54
  4. Step 4: Simplify right side
    14,671.20x = 174,525,849.49
  5. Step 5: Solve for x
    x = 174,525,849.49/14,671.20
  6. Step 6: Final answer
    x = 11,895.81

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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.