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Finding the Fourth Proportional to 7,859.80, 11,772.28 and 4,564.72

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Solution

The fourth proportional to 7,859.80, 11,772.28 and 4,564.72 is: 6,836.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,859.80 : 11,772.28 = 4,564.72 : x
  2. Step 2: Convert to fraction form
    7,859.80/11,772.28 = 4,564.72/x
  3. Step 3: Cross multiply
    7,859.80x = 11,772.28 × 4,564.72
  4. Step 4: Simplify right side
    7,859.80x = 53,737,161.96
  5. Step 5: Solve for x
    x = 53,737,161.96/7,859.80
  6. Step 6: Final answer
    x = 6,836.96

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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.