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Finding the Fourth Proportional to 11,339.20, 16,978.08 and 5,855.68

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Solution

The fourth proportional to 11,339.20, 16,978.08 and 5,855.68 is: 8,767.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,339.20 : 16,978.08 = 5,855.68 : x
  2. Step 2: Convert to fraction form
    11,339.20/16,978.08 = 5,855.68/x
  3. Step 3: Cross multiply
    11,339.20x = 16,978.08 × 5,855.68
  4. Step 4: Simplify right side
    11,339.20x = 99,418,203.49
  5. Step 5: Solve for x
    x = 99,418,203.49/11,339.20
  6. Step 6: Final answer
    x = 8,767.66

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1.5x scale

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.