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Finding the Fourth Proportional to 16,699.70, 25,027.85 and 12,506.81

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Solution

The fourth proportional to 16,699.70, 25,027.85 and 12,506.81 is: 18,743.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,699.70 : 25,027.85 = 12,506.81 : x
  2. Step 2: Convert to fraction form
    16,699.70/25,027.85 = 12,506.81/x
  3. Step 3: Cross multiply
    16,699.70x = 25,027.85 × 12,506.81
  4. Step 4: Simplify right side
    16,699.70x = 313,018,470.79
  5. Step 5: Solve for x
    x = 313,018,470.79/16,699.70
  6. Step 6: Final answer
    x = 18,743.95

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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.