Home / 12,769.60-17,620.80-7,180.48

Finding the Fourth Proportional to 12,769.60, 17,620.80 and 7,180.48

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Solution

The fourth proportional to 12,769.60, 17,620.80 and 7,180.48 is: 9,908.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,769.60 : 17,620.80 = 7,180.48 : x
  2. Step 2: Convert to fraction form
    12,769.60/17,620.80 = 7,180.48/x
  3. Step 3: Cross multiply
    12,769.60x = 17,620.80 × 7,180.48
  4. Step 4: Simplify right side
    12,769.60x = 126,525,801.98
  5. Step 5: Solve for x
    x = 126,525,801.98/12,769.60
  6. Step 6: Final answer
    x = 9,908.36

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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.