Home / 13,513.20-20,260.20-6,121.20

Finding the Fourth Proportional to 13,513.20, 20,260.20 and 6,121.20

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Solution

The fourth proportional to 13,513.20, 20,260.20 and 6,121.20 is: 9,177.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,513.20 : 20,260.20 = 6,121.20 : x
  2. Step 2: Convert to fraction form
    13,513.20/20,260.20 = 6,121.20/x
  3. Step 3: Cross multiply
    13,513.20x = 20,260.20 × 6,121.20
  4. Step 4: Simplify right side
    13,513.20x = 124,016,736.24
  5. Step 5: Solve for x
    x = 124,016,736.24/13,513.20
  6. Step 6: Final answer
    x = 9,177.45

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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.