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Finding the Fourth Proportional to 16,690.30, 25,040.31 and 7,913.14

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Solution

The fourth proportional to 16,690.30, 25,040.31 and 7,913.14 is: 11,872.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,690.30 : 25,040.31 = 7,913.14 : x
  2. Step 2: Convert to fraction form
    16,690.30/25,040.31 = 7,913.14/x
  3. Step 3: Cross multiply
    16,690.30x = 25,040.31 × 7,913.14
  4. Step 4: Simplify right side
    16,690.30x = 198,147,478.67
  5. Step 5: Solve for x
    x = 198,147,478.67/16,690.30
  6. Step 6: Final answer
    x = 11,872.01

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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.