Home / 21,329.72-29,444.45-13,779.73

Finding the Fourth Proportional to 21,329.72, 29,444.45 and 13,779.73

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Solution

The fourth proportional to 21,329.72, 29,444.45 and 13,779.73 is: 19,022.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,329.72 : 29,444.45 = 13,779.73 : x
  2. Step 2: Convert to fraction form
    21,329.72/29,444.45 = 13,779.73/x
  3. Step 3: Cross multiply
    21,329.72x = 29,444.45 × 13,779.73
  4. Step 4: Simplify right side
    21,329.72x = 405,736,571.00
  5. Step 5: Solve for x
    x = 405,736,571.00/21,329.72
  6. Step 6: Final answer
    x = 19,022.12

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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.