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Finding the Fourth Proportional to 18,940.64, 28,411.04 and 5,792.96

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Solution

The fourth proportional to 18,940.64, 28,411.04 and 5,792.96 is: 8,689.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,940.64 : 28,411.04 = 5,792.96 : x
  2. Step 2: Convert to fraction form
    18,940.64/28,411.04 = 5,792.96/x
  3. Step 3: Cross multiply
    18,940.64x = 28,411.04 × 5,792.96
  4. Step 4: Simplify right side
    18,940.64x = 164,584,018.28
  5. Step 5: Solve for x
    x = 164,584,018.28/18,940.64
  6. Step 6: Final answer
    x = 8,689.46

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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.