Home / 12,202.78-16,829.60-9,680.90

Finding the Fourth Proportional to 12,202.78, 16,829.60 and 9,680.90

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Solution

The fourth proportional to 12,202.78, 16,829.60 and 9,680.90 is: 13,351.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,202.78 : 16,829.60 = 9,680.90 : x
  2. Step 2: Convert to fraction form
    12,202.78/16,829.60 = 9,680.90/x
  3. Step 3: Cross multiply
    12,202.78x = 16,829.60 × 9,680.90
  4. Step 4: Simplify right side
    12,202.78x = 162,925,590.49
  5. Step 5: Solve for x
    x = 162,925,590.49/12,202.78
  6. Step 6: Final answer
    x = 13,351.51

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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.