Home / 13,629.88-18,812.46-8,659

Finding the Fourth Proportional to 13,629.88, 18,812.46 and 8,659

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Solution

The fourth proportional to 13,629.88, 18,812.46 and 8,659 is: 11,951.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,629.88 : 18,812.46 = 8,659 : x
  2. Step 2: Convert to fraction form
    13,629.88/18,812.46 = 8,659/x
  3. Step 3: Cross multiply
    13,629.88x = 18,812.46 × 8,659
  4. Step 4: Simplify right side
    13,629.88x = 162,897,091.14
  5. Step 5: Solve for x
    x = 162,897,091.14/13,629.88
  6. Step 6: Final answer
    x = 11,951.47

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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.