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Finding the Fourth Proportional to 9,320.68, 13,978 and 3,079.24

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Solution

The fourth proportional to 9,320.68, 13,978 and 3,079.24 is: 4,617.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,320.68 : 13,978 = 3,079.24 : x
  2. Step 2: Convert to fraction form
    9,320.68/13,978 = 3,079.24/x
  3. Step 3: Cross multiply
    9,320.68x = 13,978 × 3,079.24
  4. Step 4: Simplify right side
    9,320.68x = 43,041,616.72
  5. Step 5: Solve for x
    x = 43,041,616.72/9,320.68
  6. Step 6: Final answer
    x = 4,617.86

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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.