Home / 21,338.80-29,447.36-11,778.80

Finding the Fourth Proportional to 21,338.80, 29,447.36 and 11,778.80

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Solution

The fourth proportional to 21,338.80, 29,447.36 and 11,778.80 is: 16,254.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,338.80 : 29,447.36 = 11,778.80 : x
  2. Step 2: Convert to fraction form
    21,338.80/29,447.36 = 11,778.80/x
  3. Step 3: Cross multiply
    21,338.80x = 29,447.36 × 11,778.80
  4. Step 4: Simplify right side
    21,338.80x = 346,854,563.97
  5. Step 5: Solve for x
    x = 346,854,563.97/21,338.80
  6. Step 6: Final answer
    x = 16,254.64

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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.