Home / 8,619.96-12,949.38-5,159.64

Finding the Fourth Proportional to 8,619.96, 12,949.38 and 5,159.64

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Solution

The fourth proportional to 8,619.96, 12,949.38 and 5,159.64 is: 7,751.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,619.96 : 12,949.38 = 5,159.64 : x
  2. Step 2: Convert to fraction form
    8,619.96/12,949.38 = 5,159.64/x
  3. Step 3: Cross multiply
    8,619.96x = 12,949.38 × 5,159.64
  4. Step 4: Simplify right side
    8,619.96x = 66,814,139.02
  5. Step 5: Solve for x
    x = 66,814,139.02/8,619.96
  6. Step 6: Final answer
    x = 7,751.10

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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.