Home / 13,689.19-18,891.09-7,401.56

Finding the Fourth Proportional to 13,689.19, 18,891.09 and 7,401.56

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Solution

The fourth proportional to 13,689.19, 18,891.09 and 7,401.56 is: 10,214.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,689.19 : 18,891.09 = 7,401.56 : x
  2. Step 2: Convert to fraction form
    13,689.19/18,891.09 = 7,401.56/x
  3. Step 3: Cross multiply
    13,689.19x = 18,891.09 × 7,401.56
  4. Step 4: Simplify right side
    13,689.19x = 139,823,536.10
  5. Step 5: Solve for x
    x = 139,823,536.10/13,689.19
  6. Step 6: Final answer
    x = 10,214.16

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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.