Home / 13,689.27-18,891.19-7,401.65

Finding the Fourth Proportional to 13,689.27, 18,891.19 and 7,401.65

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Solution

The fourth proportional to 13,689.27, 18,891.19 and 7,401.65 is: 10,214.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,689.27 : 18,891.19 = 7,401.65 : x
  2. Step 2: Convert to fraction form
    13,689.27/18,891.19 = 7,401.65/x
  3. Step 3: Cross multiply
    13,689.27x = 18,891.19 × 7,401.65
  4. Step 4: Simplify right side
    13,689.27x = 139,825,891.26
  5. Step 5: Solve for x
    x = 139,825,891.26/13,689.27
  6. Step 6: Final answer
    x = 10,214.27

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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.