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Finding the Fourth Proportional to 10,891.65, 16,339.20 and 4,651.68

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Solution

The fourth proportional to 10,891.65, 16,339.20 and 4,651.68 is: 6,978.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,891.65 : 16,339.20 = 4,651.68 : x
  2. Step 2: Convert to fraction form
    10,891.65/16,339.20 = 4,651.68/x
  3. Step 3: Cross multiply
    10,891.65x = 16,339.20 × 4,651.68
  4. Step 4: Simplify right side
    10,891.65x = 76,004,729.86
  5. Step 5: Solve for x
    x = 76,004,729.86/10,891.65
  6. Step 6: Final answer
    x = 6,978.26

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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.