Home / 13,287.16-18,334.38-7,318.81

Finding the Fourth Proportional to 13,287.16, 18,334.38 and 7,318.81

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Solution

The fourth proportional to 13,287.16, 18,334.38 and 7,318.81 is: 10,098.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,287.16 : 18,334.38 = 7,318.81 : x
  2. Step 2: Convert to fraction form
    13,287.16/18,334.38 = 7,318.81/x
  3. Step 3: Cross multiply
    13,287.16x = 18,334.38 × 7,318.81
  4. Step 4: Simplify right side
    13,287.16x = 134,185,843.69
  5. Step 5: Solve for x
    x = 134,185,843.69/13,287.16
  6. Step 6: Final answer
    x = 10,098.91

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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.