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Finding the Fourth Proportional to 30,935.28, 42,690.72 and 16,788.13

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Solution

The fourth proportional to 30,935.28, 42,690.72 and 16,788.13 is: 23,167.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,935.28 : 42,690.72 = 16,788.13 : x
  2. Step 2: Convert to fraction form
    30,935.28/42,690.72 = 16,788.13/x
  3. Step 3: Cross multiply
    30,935.28x = 42,690.72 × 16,788.13
  4. Step 4: Simplify right side
    30,935.28x = 716,697,357.15
  5. Step 5: Solve for x
    x = 716,697,357.15/30,935.28
  6. Step 6: Final answer
    x = 23,167.64

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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.