Home / 13,418.09-18,516.66-7,449.39

Finding the Fourth Proportional to 13,418.09, 18,516.66 and 7,449.39

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Solution

The fourth proportional to 13,418.09, 18,516.66 and 7,449.39 is: 10,279.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,418.09 : 18,516.66 = 7,449.39 : x
  2. Step 2: Convert to fraction form
    13,418.09/18,516.66 = 7,449.39/x
  3. Step 3: Cross multiply
    13,418.09x = 18,516.66 × 7,449.39
  4. Step 4: Simplify right side
    13,418.09x = 137,937,821.84
  5. Step 5: Solve for x
    x = 137,937,821.84/13,418.09
  6. Step 6: Final answer
    x = 10,279.99

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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.