Home / 13,693.20-20,540.40-7,115.28

Finding the Fourth Proportional to 13,693.20, 20,540.40 and 7,115.28

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Solution

The fourth proportional to 13,693.20, 20,540.40 and 7,115.28 is: 10,673.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,693.20 : 20,540.40 = 7,115.28 : x
  2. Step 2: Convert to fraction form
    13,693.20/20,540.40 = 7,115.28/x
  3. Step 3: Cross multiply
    13,693.20x = 20,540.40 × 7,115.28
  4. Step 4: Simplify right side
    13,693.20x = 146,150,697.31
  5. Step 5: Solve for x
    x = 146,150,697.31/13,693.20
  6. Step 6: Final answer
    x = 10,673.23

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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.