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Finding the Fourth Proportional to 26,979.82, 40,468.29 and 8,259.87

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Solution

The fourth proportional to 26,979.82, 40,468.29 and 8,259.87 is: 12,389.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,979.82 : 40,468.29 = 8,259.87 : x
  2. Step 2: Convert to fraction form
    26,979.82/40,468.29 = 8,259.87/x
  3. Step 3: Cross multiply
    26,979.82x = 40,468.29 × 8,259.87
  4. Step 4: Simplify right side
    26,979.82x = 334,262,814.52
  5. Step 5: Solve for x
    x = 334,262,814.52/26,979.82
  6. Step 6: Final answer
    x = 12,389.36

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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.