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Finding the Fourth Proportional to 8,437.64, 12,656.45 and 3,239.87

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Solution

The fourth proportional to 8,437.64, 12,656.45 and 3,239.87 is: 4,859.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,437.64 : 12,656.45 = 3,239.87 : x
  2. Step 2: Convert to fraction form
    8,437.64/12,656.45 = 3,239.87/x
  3. Step 3: Cross multiply
    8,437.64x = 12,656.45 × 3,239.87
  4. Step 4: Simplify right side
    8,437.64x = 41,005,197.48
  5. Step 5: Solve for x
    x = 41,005,197.48/8,437.64
  6. Step 6: Final answer
    x = 4,859.80

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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.