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Finding the Fourth Proportional to 8,887.78, 13,315.87 and 5,186.89

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Solution

The fourth proportional to 8,887.78, 13,315.87 and 5,186.89 is: 7,771.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,887.78 : 13,315.87 = 5,186.89 : x
  2. Step 2: Convert to fraction form
    8,887.78/13,315.87 = 5,186.89/x
  3. Step 3: Cross multiply
    8,887.78x = 13,315.87 × 5,186.89
  4. Step 4: Simplify right side
    8,887.78x = 69,067,952.94
  5. Step 5: Solve for x
    x = 69,067,952.94/8,887.78
  6. Step 6: Final answer
    x = 7,771.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.