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Finding the Fourth Proportional to 12,790.68, 19,188.44 and 4,999

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Solution

The fourth proportional to 12,790.68, 19,188.44 and 4,999 is: 7,499.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,790.68 : 19,188.44 = 4,999 : x
  2. Step 2: Convert to fraction form
    12,790.68/19,188.44 = 4,999/x
  3. Step 3: Cross multiply
    12,790.68x = 19,188.44 × 4,999
  4. Step 4: Simplify right side
    12,790.68x = 95,923,011.56
  5. Step 5: Solve for x
    x = 95,923,011.56/12,790.68
  6. Step 6: Final answer
    x = 7,499.45

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1.5x scale

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.