Home / 13,122.05-18,107.81-7,456.65

Finding the Fourth Proportional to 13,122.05, 18,107.81 and 7,456.65

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Solution

The fourth proportional to 13,122.05, 18,107.81 and 7,456.65 is: 10,289.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,122.05 : 18,107.81 = 7,456.65 : x
  2. Step 2: Convert to fraction form
    13,122.05/18,107.81 = 7,456.65/x
  3. Step 3: Cross multiply
    13,122.05x = 18,107.81 × 7,456.65
  4. Step 4: Simplify right side
    13,122.05x = 135,023,564.15
  5. Step 5: Solve for x
    x = 135,023,564.15/13,122.05
  6. Step 6: Final answer
    x = 10,289.83

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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.