Home / 21,338.80-29,441.64-13,785.43

Finding the Fourth Proportional to 21,338.80, 29,441.64 and 13,785.43

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Solution

The fourth proportional to 21,338.80, 29,441.64 and 13,785.43 is: 19,020.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,338.80 : 29,441.64 = 13,785.43 : x
  2. Step 2: Convert to fraction form
    21,338.80/29,441.64 = 13,785.43/x
  3. Step 3: Cross multiply
    21,338.80x = 29,441.64 × 13,785.43
  4. Step 4: Simplify right side
    21,338.80x = 405,865,667.31
  5. Step 5: Solve for x
    x = 405,865,667.31/21,338.80
  6. Step 6: Final answer
    x = 19,020.08

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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.