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Finding the Fourth Proportional to 12,700.99, 19,063.78 and 6,131.79

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Solution

The fourth proportional to 12,700.99, 19,063.78 and 6,131.79 is: 9,203.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,700.99 : 19,063.78 = 6,131.79 : x
  2. Step 2: Convert to fraction form
    12,700.99/19,063.78 = 6,131.79/x
  3. Step 3: Cross multiply
    12,700.99x = 19,063.78 × 6,131.79
  4. Step 4: Simplify right side
    12,700.99x = 116,895,000.25
  5. Step 5: Solve for x
    x = 116,895,000.25/12,700.99
  6. Step 6: Final answer
    x = 9,203.62

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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.