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Finding the Fourth Proportional to 14,480.64, 21,720.74 and 4,619.86

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Solution

The fourth proportional to 14,480.64, 21,720.74 and 4,619.86 is: 6,929.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,480.64 : 21,720.74 = 4,619.86 : x
  2. Step 2: Convert to fraction form
    14,480.64/21,720.74 = 4,619.86/x
  3. Step 3: Cross multiply
    14,480.64x = 21,720.74 × 4,619.86
  4. Step 4: Simplify right side
    14,480.64x = 100,346,700.50
  5. Step 5: Solve for x
    x = 100,346,700.50/14,480.64
  6. Step 6: Final answer
    x = 6,929.71

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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.