Home / 21,180.80-29,205.54-13,513.82

Finding the Fourth Proportional to 21,180.80, 29,205.54 and 13,513.82

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Solution

The fourth proportional to 21,180.80, 29,205.54 and 13,513.82 is: 18,633.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,180.80 : 29,205.54 = 13,513.82 : x
  2. Step 2: Convert to fraction form
    21,180.80/29,205.54 = 13,513.82/x
  3. Step 3: Cross multiply
    21,180.80x = 29,205.54 × 13,513.82
  4. Step 4: Simplify right side
    21,180.80x = 394,678,226.53
  5. Step 5: Solve for x
    x = 394,678,226.53/21,180.80
  6. Step 6: Final answer
    x = 18,633.77

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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.