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Finding the Fourth Proportional to 7,890.56, 11,853.02 and 4,772.03

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Solution

The fourth proportional to 7,890.56, 11,853.02 and 4,772.03 is: 7,168.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,890.56 : 11,853.02 = 4,772.03 : x
  2. Step 2: Convert to fraction form
    7,890.56/11,853.02 = 4,772.03/x
  3. Step 3: Cross multiply
    7,890.56x = 11,853.02 × 4,772.03
  4. Step 4: Simplify right side
    7,890.56x = 56,562,883.91
  5. Step 5: Solve for x
    x = 56,562,883.91/7,890.56
  6. Step 6: Final answer
    x = 7,168.43

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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.