Home / 12,387.12-18,556.38-7,182.06

Finding the Fourth Proportional to 12,387.12, 18,556.38 and 7,182.06

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Solution

The fourth proportional to 12,387.12, 18,556.38 and 7,182.06 is: 10,759.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,387.12 : 18,556.38 = 7,182.06 : x
  2. Step 2: Convert to fraction form
    12,387.12/18,556.38 = 7,182.06/x
  3. Step 3: Cross multiply
    12,387.12x = 18,556.38 × 7,182.06
  4. Step 4: Simplify right side
    12,387.12x = 133,273,034.54
  5. Step 5: Solve for x
    x = 133,273,034.54/12,387.12
  6. Step 6: Final answer
    x = 10,759.00

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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.