Home / 13,725.78-18,942.08-8,346.66

Finding the Fourth Proportional to 13,725.78, 18,942.08 and 8,346.66

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Solution

The fourth proportional to 13,725.78, 18,942.08 and 8,346.66 is: 11,518.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,725.78 : 18,942.08 = 8,346.66 : x
  2. Step 2: Convert to fraction form
    13,725.78/18,942.08 = 8,346.66/x
  3. Step 3: Cross multiply
    13,725.78x = 18,942.08 × 8,346.66
  4. Step 4: Simplify right side
    13,725.78x = 158,103,101.45
  5. Step 5: Solve for x
    x = 158,103,101.45/13,725.78
  6. Step 6: Final answer
    x = 11,518.70

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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.