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Finding the Fourth Proportional to 11,994.67, 16,559.34 and 8,420.60

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Solution

The fourth proportional to 11,994.67, 16,559.34 and 8,420.60 is: 11,625.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,994.67 : 16,559.34 = 8,420.60 : x
  2. Step 2: Convert to fraction form
    11,994.67/16,559.34 = 8,420.60/x
  3. Step 3: Cross multiply
    11,994.67x = 16,559.34 × 8,420.60
  4. Step 4: Simplify right side
    11,994.67x = 139,439,471.79
  5. Step 5: Solve for x
    x = 139,439,471.79/11,994.67
  6. Step 6: Final answer
    x = 11,625.12

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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.