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Finding the Fourth Proportional to 12,699.91, 19,051.99 and 4,695.15

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Solution

The fourth proportional to 12,699.91, 19,051.99 and 4,695.15 is: 7,043.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,699.91 : 19,051.99 = 4,695.15 : x
  2. Step 2: Convert to fraction form
    12,699.91/19,051.99 = 4,695.15/x
  3. Step 3: Cross multiply
    12,699.91x = 19,051.99 × 4,695.15
  4. Step 4: Simplify right side
    12,699.91x = 89,451,929.80
  5. Step 5: Solve for x
    x = 89,451,929.80/12,699.91
  6. Step 6: Final answer
    x = 7,043.51

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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.