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Finding the Fourth Proportional to 7,889.92, 11,835.48 and 2,624.72

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Solution

The fourth proportional to 7,889.92, 11,835.48 and 2,624.72 is: 3,937.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,889.92 : 11,835.48 = 2,624.72 : x
  2. Step 2: Convert to fraction form
    7,889.92/11,835.48 = 2,624.72/x
  3. Step 3: Cross multiply
    7,889.92x = 11,835.48 × 2,624.72
  4. Step 4: Simplify right side
    7,889.92x = 31,064,821.07
  5. Step 5: Solve for x
    x = 31,064,821.07/7,889.92
  6. Step 6: Final answer
    x = 3,937.28

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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.