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Finding the Fourth Proportional to 8,469.19, 11,687.89 and 5,111.94

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Solution

The fourth proportional to 8,469.19, 11,687.89 and 5,111.94 is: 7,054.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,469.19 : 11,687.89 = 5,111.94 : x
  2. Step 2: Convert to fraction form
    8,469.19/11,687.89 = 5,111.94/x
  3. Step 3: Cross multiply
    8,469.19x = 11,687.89 × 5,111.94
  4. Step 4: Simplify right side
    8,469.19x = 59,747,779.63
  5. Step 5: Solve for x
    x = 59,747,779.63/8,469.19
  6. Step 6: Final answer
    x = 7,054.72

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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.