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Finding the Fourth Proportional to 11,887.13, 16,408.55 and 6,919.13

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Solution

The fourth proportional to 11,887.13, 16,408.55 and 6,919.13 is: 9,550.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,887.13 : 16,408.55 = 6,919.13 : x
  2. Step 2: Convert to fraction form
    11,887.13/16,408.55 = 6,919.13/x
  3. Step 3: Cross multiply
    11,887.13x = 16,408.55 × 6,919.13
  4. Step 4: Simplify right side
    11,887.13x = 113,532,825.82
  5. Step 5: Solve for x
    x = 113,532,825.82/11,887.13
  6. Step 6: Final answer
    x = 9,550.91

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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.