Home / 19,431.68-26,813.63-11,879.78

Finding the Fourth Proportional to 19,431.68, 26,813.63 and 11,879.78

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Solution

The fourth proportional to 19,431.68, 26,813.63 and 11,879.78 is: 16,392.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,431.68 : 26,813.63 = 11,879.78 : x
  2. Step 2: Convert to fraction form
    19,431.68/26,813.63 = 11,879.78/x
  3. Step 3: Cross multiply
    19,431.68x = 26,813.63 × 11,879.78
  4. Step 4: Simplify right side
    19,431.68x = 318,539,921.03
  5. Step 5: Solve for x
    x = 318,539,921.03/19,431.68
  6. Step 6: Final answer
    x = 16,392.82

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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.