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Finding the Fourth Proportional to 20,792.10, 28,693.04 and 11,360.73

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Solution

The fourth proportional to 20,792.10, 28,693.04 and 11,360.73 is: 15,677.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,792.10 : 28,693.04 = 11,360.73 : x
  2. Step 2: Convert to fraction form
    20,792.10/28,693.04 = 11,360.73/x
  3. Step 3: Cross multiply
    20,792.10x = 28,693.04 × 11,360.73
  4. Step 4: Simplify right side
    20,792.10x = 325,973,880.32
  5. Step 5: Solve for x
    x = 325,973,880.32/20,792.10
  6. Step 6: Final answer
    x = 15,677.78

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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.