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Finding the Fourth Proportional to 19,935.30, 29,900.42 and 12,517.12

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Solution

The fourth proportional to 19,935.30, 29,900.42 and 12,517.12 is: 18,774.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,935.30 : 29,900.42 = 12,517.12 : x
  2. Step 2: Convert to fraction form
    19,935.30/29,900.42 = 12,517.12/x
  3. Step 3: Cross multiply
    19,935.30x = 29,900.42 × 12,517.12
  4. Step 4: Simplify right side
    19,935.30x = 374,267,145.19
  5. Step 5: Solve for x
    x = 374,267,145.19/19,935.30
  6. Step 6: Final answer
    x = 18,774.09

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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.