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Finding the Fourth Proportional to 12,807.53, 19,194.89 and 9,879.69

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Solution

The fourth proportional to 12,807.53, 19,194.89 and 9,879.69 is: 14,806.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,807.53 : 19,194.89 = 9,879.69 : x
  2. Step 2: Convert to fraction form
    12,807.53/19,194.89 = 9,879.69/x
  3. Step 3: Cross multiply
    12,807.53x = 19,194.89 × 9,879.69
  4. Step 4: Simplify right side
    12,807.53x = 189,639,513.39
  5. Step 5: Solve for x
    x = 189,639,513.39/12,807.53
  6. Step 6: Final answer
    x = 14,806.88

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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.