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Finding the Fourth Proportional to 14,731.99, 20,329.94 and 8,107.99

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Solution

The fourth proportional to 14,731.99, 20,329.94 and 8,107.99 is: 11,188.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,731.99 : 20,329.94 = 8,107.99 : x
  2. Step 2: Convert to fraction form
    14,731.99/20,329.94 = 8,107.99/x
  3. Step 3: Cross multiply
    14,731.99x = 20,329.94 × 8,107.99
  4. Step 4: Simplify right side
    14,731.99x = 164,834,909.68
  5. Step 5: Solve for x
    x = 164,834,909.68/14,731.99
  6. Step 6: Final answer
    x = 11,188.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.