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Finding the Fourth Proportional to 7,855.52, 11,785.10 and 2,308.91

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Solution

The fourth proportional to 7,855.52, 11,785.10 and 2,308.91 is: 3,463.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,855.52 : 11,785.10 = 2,308.91 : x
  2. Step 2: Convert to fraction form
    7,855.52/11,785.10 = 2,308.91/x
  3. Step 3: Cross multiply
    7,855.52x = 11,785.10 × 2,308.91
  4. Step 4: Simplify right side
    7,855.52x = 27,210,664.77
  5. Step 5: Solve for x
    x = 27,210,664.77/7,855.52
  6. Step 6: Final answer
    x = 3,463.89

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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.