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Finding the Fourth Proportional to 19,792.10, 29,688.15 and 18,917.30

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Solution

The fourth proportional to 19,792.10, 29,688.15 and 18,917.30 is: 28,375.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,792.10 : 29,688.15 = 18,917.30 : x
  2. Step 2: Convert to fraction form
    19,792.10/29,688.15 = 18,917.30/x
  3. Step 3: Cross multiply
    19,792.10x = 29,688.15 × 18,917.30
  4. Step 4: Simplify right side
    19,792.10x = 561,619,640.00
  5. Step 5: Solve for x
    x = 561,619,640.00/19,792.10
  6. Step 6: Final answer
    x = 28,375.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.