Home / 12,150.51-18,189.10-7,982.65

Finding the Fourth Proportional to 12,150.51, 18,189.10 and 7,982.65

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Solution

The fourth proportional to 12,150.51, 18,189.10 and 7,982.65 is: 11,949.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,150.51 : 18,189.10 = 7,982.65 : x
  2. Step 2: Convert to fraction form
    12,150.51/18,189.10 = 7,982.65/x
  3. Step 3: Cross multiply
    12,150.51x = 18,189.10 × 7,982.65
  4. Step 4: Simplify right side
    12,150.51x = 145,197,219.12
  5. Step 5: Solve for x
    x = 145,197,219.12/12,150.51
  6. Step 6: Final answer
    x = 11,949.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.