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Finding the Fourth Proportional to 20,362.64, 28,101.81 and 13,659.49

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Solution

The fourth proportional to 20,362.64, 28,101.81 and 13,659.49 is: 18,851.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,362.64 : 28,101.81 = 13,659.49 : x
  2. Step 2: Convert to fraction form
    20,362.64/28,101.81 = 13,659.49/x
  3. Step 3: Cross multiply
    20,362.64x = 28,101.81 × 13,659.49
  4. Step 4: Simplify right side
    20,362.64x = 383,856,282.54
  5. Step 5: Solve for x
    x = 383,856,282.54/20,362.64
  6. Step 6: Final answer
    x = 18,851.01

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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.