Home / 13,139.05-18,132.31-7,473.65

Finding the Fourth Proportional to 13,139.05, 18,132.31 and 7,473.65

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Solution

The fourth proportional to 13,139.05, 18,132.31 and 7,473.65 is: 10,313.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,139.05 : 18,132.31 = 7,473.65 : x
  2. Step 2: Convert to fraction form
    13,139.05/18,132.31 = 7,473.65/x
  3. Step 3: Cross multiply
    13,139.05x = 18,132.31 × 7,473.65
  4. Step 4: Simplify right side
    13,139.05x = 135,514,600.98
  5. Step 5: Solve for x
    x = 135,514,600.98/13,139.05
  6. Step 6: Final answer
    x = 10,313.88

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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.