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Finding the Fourth Proportional to 20,797.12, 28,700.03 and 11,365.68

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Solution

The fourth proportional to 20,797.12, 28,700.03 and 11,365.68 is: 15,684.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,797.12 : 28,700.03 = 11,365.68 : x
  2. Step 2: Convert to fraction form
    20,797.12/28,700.03 = 11,365.68/x
  3. Step 3: Cross multiply
    20,797.12x = 28,700.03 × 11,365.68
  4. Step 4: Simplify right side
    20,797.12x = 326,195,356.97
  5. Step 5: Solve for x
    x = 326,195,356.97/20,797.12
  6. Step 6: Final answer
    x = 15,684.64

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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.