Home / 21,290.87-29,382.73-11,859.44

Finding the Fourth Proportional to 21,290.87, 29,382.73 and 11,859.44

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Solution

The fourth proportional to 21,290.87, 29,382.73 and 11,859.44 is: 16,366.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,290.87 : 29,382.73 = 11,859.44 : x
  2. Step 2: Convert to fraction form
    21,290.87/29,382.73 = 11,859.44/x
  3. Step 3: Cross multiply
    21,290.87x = 29,382.73 × 11,859.44
  4. Step 4: Simplify right side
    21,290.87x = 348,462,546.91
  5. Step 5: Solve for x
    x = 348,462,546.91/21,290.87
  6. Step 6: Final answer
    x = 16,366.76

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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.