Home / 13,731.25-18,943.71-8,956.75

Finding the Fourth Proportional to 13,731.25, 18,943.71 and 8,956.75

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Solution

The fourth proportional to 13,731.25, 18,943.71 and 8,956.75 is: 12,356.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,731.25 : 18,943.71 = 8,956.75 : x
  2. Step 2: Convert to fraction form
    13,731.25/18,943.71 = 8,956.75/x
  3. Step 3: Cross multiply
    13,731.25x = 18,943.71 × 8,956.75
  4. Step 4: Simplify right side
    13,731.25x = 169,674,074.54
  5. Step 5: Solve for x
    x = 169,674,074.54/13,731.25
  6. Step 6: Final answer
    x = 12,356.78

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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.