Home / 9,159.06-12,639.24-5,179.80

Finding the Fourth Proportional to 9,159.06, 12,639.24 and 5,179.80

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Solution

The fourth proportional to 9,159.06, 12,639.24 and 5,179.80 is: 7,147.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,159.06 : 12,639.24 = 5,179.80 : x
  2. Step 2: Convert to fraction form
    9,159.06/12,639.24 = 5,179.80/x
  3. Step 3: Cross multiply
    9,159.06x = 12,639.24 × 5,179.80
  4. Step 4: Simplify right side
    9,159.06x = 65,468,735.35
  5. Step 5: Solve for x
    x = 65,468,735.35/9,159.06
  6. Step 6: Final answer
    x = 7,147.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.