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Finding the Fourth Proportional to 8,690.68, 13,026.24 and 4,311.28

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Solution

The fourth proportional to 8,690.68, 13,026.24 and 4,311.28 is: 6,462.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,690.68 : 13,026.24 = 4,311.28 : x
  2. Step 2: Convert to fraction form
    8,690.68/13,026.24 = 4,311.28/x
  3. Step 3: Cross multiply
    8,690.68x = 13,026.24 × 4,311.28
  4. Step 4: Simplify right side
    8,690.68x = 56,159,767.99
  5. Step 5: Solve for x
    x = 56,159,767.99/8,690.68
  6. Step 6: Final answer
    x = 6,462.07

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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.