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Finding the Fourth Proportional to 11,993.12, 16,551.96 and 7,278.80

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Solution

The fourth proportional to 11,993.12, 16,551.96 and 7,278.80 is: 10,045.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,993.12 : 16,551.96 = 7,278.80 : x
  2. Step 2: Convert to fraction form
    11,993.12/16,551.96 = 7,278.80/x
  3. Step 3: Cross multiply
    11,993.12x = 16,551.96 × 7,278.80
  4. Step 4: Simplify right side
    11,993.12x = 120,478,406.45
  5. Step 5: Solve for x
    x = 120,478,406.45/11,993.12
  6. Step 6: Final answer
    x = 10,045.63

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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.