Home / 13,287.20-18,336.46-7,318.90

Finding the Fourth Proportional to 13,287.20, 18,336.46 and 7,318.90

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Solution

The fourth proportional to 13,287.20, 18,336.46 and 7,318.90 is: 10,100.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,287.20 : 18,336.46 = 7,318.90 : x
  2. Step 2: Convert to fraction form
    13,287.20/18,336.46 = 7,318.90/x
  3. Step 3: Cross multiply
    13,287.20x = 18,336.46 × 7,318.90
  4. Step 4: Simplify right side
    13,287.20x = 134,202,717.09
  5. Step 5: Solve for x
    x = 134,202,717.09/13,287.20
  6. Step 6: Final answer
    x = 10,100.15

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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.