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Finding the Fourth Proportional to 20,683, 28,540.38 and 11,727.64

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Solution

The fourth proportional to 20,683, 28,540.38 and 11,727.64 is: 16,182.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,683 : 28,540.38 = 11,727.64 : x
  2. Step 2: Convert to fraction form
    20,683/28,540.38 = 11,727.64/x
  3. Step 3: Cross multiply
    20,683x = 28,540.38 × 11,727.64
  4. Step 4: Simplify right side
    20,683x = 334,711,302.10
  5. Step 5: Solve for x
    x = 334,711,302.10/20,683
  6. Step 6: Final answer
    x = 16,182.92

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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.