Home / 13,921.82-20,830.40-9,769.92

Finding the Fourth Proportional to 13,921.82, 20,830.40 and 9,769.92

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Solution

The fourth proportional to 13,921.82, 20,830.40 and 9,769.92 is: 14,618.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,921.82 : 20,830.40 = 9,769.92 : x
  2. Step 2: Convert to fraction form
    13,921.82/20,830.40 = 9,769.92/x
  3. Step 3: Cross multiply
    13,921.82x = 20,830.40 × 9,769.92
  4. Step 4: Simplify right side
    13,921.82x = 203,511,341.57
  5. Step 5: Solve for x
    x = 203,511,341.57/13,921.82
  6. Step 6: Final answer
    x = 14,618.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.