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Finding the Fourth Proportional to 20,827.53, 28,742.04 and 11,396.70

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Solution

The fourth proportional to 20,827.53, 28,742.04 and 11,396.70 is: 15,727.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,827.53 : 28,742.04 = 11,396.70 : x
  2. Step 2: Convert to fraction form
    20,827.53/28,742.04 = 11,396.70/x
  3. Step 3: Cross multiply
    20,827.53x = 28,742.04 × 11,396.70
  4. Step 4: Simplify right side
    20,827.53x = 327,564,407.27
  5. Step 5: Solve for x
    x = 327,564,407.27/20,827.53
  6. Step 6: Final answer
    x = 15,727.47

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.