Home / 21,320.12-29,421.25-11,759.80

Finding the Fourth Proportional to 21,320.12, 29,421.25 and 11,759.80

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Solution

The fourth proportional to 21,320.12, 29,421.25 and 11,759.80 is: 16,228.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,320.12 : 29,421.25 = 11,759.80 : x
  2. Step 2: Convert to fraction form
    21,320.12/29,421.25 = 11,759.80/x
  3. Step 3: Cross multiply
    21,320.12x = 29,421.25 × 11,759.80
  4. Step 4: Simplify right side
    21,320.12x = 345,987,986.35
  5. Step 5: Solve for x
    x = 345,987,986.35/21,320.12
  6. Step 6: Final answer
    x = 16,228.24

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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.