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Finding the Fourth Proportional to 18,792.64, 25,880.96 and 18,384.32

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Solution

The fourth proportional to 18,792.64, 25,880.96 and 18,384.32 is: 25,318.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,792.64 : 25,880.96 = 18,384.32 : x
  2. Step 2: Convert to fraction form
    18,792.64/25,880.96 = 18,384.32/x
  3. Step 3: Cross multiply
    18,792.64x = 25,880.96 × 18,384.32
  4. Step 4: Simplify right side
    18,792.64x = 475,803,850.55
  5. Step 5: Solve for x
    x = 475,803,850.55/18,792.64
  6. Step 6: Final answer
    x = 25,318.63

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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.