Home / 13,755.78-18,949.35-9,967.74

Finding the Fourth Proportional to 13,755.78, 18,949.35 and 9,967.74

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Solution

The fourth proportional to 13,755.78, 18,949.35 and 9,967.74 is: 13,731.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,755.78 : 18,949.35 = 9,967.74 : x
  2. Step 2: Convert to fraction form
    13,755.78/18,949.35 = 9,967.74/x
  3. Step 3: Cross multiply
    13,755.78x = 18,949.35 × 9,967.74
  4. Step 4: Simplify right side
    13,755.78x = 188,882,193.97
  5. Step 5: Solve for x
    x = 188,882,193.97/13,755.78
  6. Step 6: Final answer
    x = 13,731.11

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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.