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Finding the Fourth Proportional to 30,388.64, 41,940.16 and 17,639.12

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Solution

The fourth proportional to 30,388.64, 41,940.16 and 17,639.12 is: 24,344.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,388.64 : 41,940.16 = 17,639.12 : x
  2. Step 2: Convert to fraction form
    30,388.64/41,940.16 = 17,639.12/x
  3. Step 3: Cross multiply
    30,388.64x = 41,940.16 × 17,639.12
  4. Step 4: Simplify right side
    30,388.64x = 739,787,515.06
  5. Step 5: Solve for x
    x = 739,787,515.06/30,388.64
  6. Step 6: Final answer
    x = 24,344.21

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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.