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Finding the Fourth Proportional to 8,858.68, 13,291.09 and 3,931.77

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Solution

The fourth proportional to 8,858.68, 13,291.09 and 3,931.77 is: 5,899.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,858.68 : 13,291.09 = 3,931.77 : x
  2. Step 2: Convert to fraction form
    8,858.68/13,291.09 = 3,931.77/x
  3. Step 3: Cross multiply
    8,858.68x = 13,291.09 × 3,931.77
  4. Step 4: Simplify right side
    8,858.68x = 52,257,508.93
  5. Step 5: Solve for x
    x = 52,257,508.93/8,858.68
  6. Step 6: Final answer
    x = 5,899.02

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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.