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Finding the Fourth Proportional to 8,155, 11,253.90 and 4,429

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Solution

The fourth proportional to 8,155, 11,253.90 and 4,429 is: 6,112.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,155 : 11,253.90 = 4,429 : x
  2. Step 2: Convert to fraction form
    8,155/11,253.90 = 4,429/x
  3. Step 3: Cross multiply
    8,155x = 11,253.90 × 4,429
  4. Step 4: Simplify right side
    8,155x = 49,843,523.10
  5. Step 5: Solve for x
    x = 49,843,523.10/8,155
  6. Step 6: Final answer
    x = 6,112.02

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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.