Home / 13,725.04-18,933.57-8,680.78

Finding the Fourth Proportional to 13,725.04, 18,933.57 and 8,680.78

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Solution

The fourth proportional to 13,725.04, 18,933.57 and 8,680.78 is: 11,975.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,725.04 : 18,933.57 = 8,680.78 : x
  2. Step 2: Convert to fraction form
    13,725.04/18,933.57 = 8,680.78/x
  3. Step 3: Cross multiply
    13,725.04x = 18,933.57 × 8,680.78
  4. Step 4: Simplify right side
    13,725.04x = 164,358,155.78
  5. Step 5: Solve for x
    x = 164,358,155.78/13,725.04
  6. Step 6: Final answer
    x = 11,975.06

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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.