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Finding the Fourth Proportional to 30,963, 42,728.96 and 16,816.08

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Solution

The fourth proportional to 30,963, 42,728.96 and 16,816.08 is: 23,206.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,963 : 42,728.96 = 16,816.08 : x
  2. Step 2: Convert to fraction form
    30,963/42,728.96 = 16,816.08/x
  3. Step 3: Cross multiply
    30,963x = 42,728.96 × 16,816.08
  4. Step 4: Simplify right side
    30,963x = 718,533,609.68
  5. Step 5: Solve for x
    x = 718,533,609.68/30,963
  6. Step 6: Final answer
    x = 23,206.20

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.