Home / 13,280.80-18,331.92-9,709.60

Finding the Fourth Proportional to 13,280.80, 18,331.92 and 9,709.60

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Solution

The fourth proportional to 13,280.80, 18,331.92 and 9,709.60 is: 13,402.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,280.80 : 18,331.92 = 9,709.60 : x
  2. Step 2: Convert to fraction form
    13,280.80/18,331.92 = 9,709.60/x
  3. Step 3: Cross multiply
    13,280.80x = 18,331.92 × 9,709.60
  4. Step 4: Simplify right side
    13,280.80x = 177,995,610.43
  5. Step 5: Solve for x
    x = 177,995,610.43/13,280.80
  6. Step 6: Final answer
    x = 13,402.48

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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.