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Finding the Fourth Proportional to 20,901.71, 28,843.21 and 11,469.53

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Solution

The fourth proportional to 20,901.71, 28,843.21 and 11,469.53 is: 15,827.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,901.71 : 28,843.21 = 11,469.53 : x
  2. Step 2: Convert to fraction form
    20,901.71/28,843.21 = 11,469.53/x
  3. Step 3: Cross multiply
    20,901.71x = 28,843.21 × 11,469.53
  4. Step 4: Simplify right side
    20,901.71x = 330,818,062.39
  5. Step 5: Solve for x
    x = 330,818,062.39/20,901.71
  6. Step 6: Final answer
    x = 15,827.32

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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.