Home / 13,286.45-18,335.30-7,318.10

Finding the Fourth Proportional to 13,286.45, 18,335.30 and 7,318.10

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Solution

The fourth proportional to 13,286.45, 18,335.30 and 7,318.10 is: 10,098.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,286.45 : 18,335.30 = 7,318.10 : x
  2. Step 2: Convert to fraction form
    13,286.45/18,335.30 = 7,318.10/x
  3. Step 3: Cross multiply
    13,286.45x = 18,335.30 × 7,318.10
  4. Step 4: Simplify right side
    13,286.45x = 134,179,430.66
  5. Step 5: Solve for x
    x = 134,179,430.66/13,286.45
  6. Step 6: Final answer
    x = 10,098.97

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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.