Home / 13,172.22-18,160.74-9,399.78

Finding the Fourth Proportional to 13,172.22, 18,160.74 and 9,399.78

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Solution

The fourth proportional to 13,172.22, 18,160.74 and 9,399.78 is: 12,959.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,172.22 : 18,160.74 = 9,399.78 : x
  2. Step 2: Convert to fraction form
    13,172.22/18,160.74 = 9,399.78/x
  3. Step 3: Cross multiply
    13,172.22x = 18,160.74 × 9,399.78
  4. Step 4: Simplify right side
    13,172.22x = 170,706,960.64
  5. Step 5: Solve for x
    x = 170,706,960.64/13,172.22
  6. Step 6: Final answer
    x = 12,959.62

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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.