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Finding the Fourth Proportional to 7,431, 11,143.92 and 2,164.59

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Solution

The fourth proportional to 7,431, 11,143.92 and 2,164.59 is: 3,246.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,431 : 11,143.92 = 2,164.59 : x
  2. Step 2: Convert to fraction form
    7,431/11,143.92 = 2,164.59/x
  3. Step 3: Cross multiply
    7,431x = 11,143.92 × 2,164.59
  4. Step 4: Simplify right side
    7,431x = 24,122,017.79
  5. Step 5: Solve for x
    x = 24,122,017.79/7,431
  6. Step 6: Final answer
    x = 3,246.13

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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.