Home / 20,615.52-28,448.68-11,183.88

Finding the Fourth Proportional to 20,615.52, 28,448.68 and 11,183.88

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Solution

The fourth proportional to 20,615.52, 28,448.68 and 11,183.88 is: 15,433.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,615.52 : 28,448.68 = 11,183.88 : x
  2. Step 2: Convert to fraction form
    20,615.52/28,448.68 = 11,183.88/x
  3. Step 3: Cross multiply
    20,615.52x = 28,448.68 × 11,183.88
  4. Step 4: Simplify right side
    20,615.52x = 318,166,623.28
  5. Step 5: Solve for x
    x = 318,166,623.28/20,615.52
  6. Step 6: Final answer
    x = 15,433.35

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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.